On the Day of Trumpets, known in Hebrew as Yom Teruah, God commands a day of great noise, a day of alarm, joy, rejoicing, and shouting. The Hebrew word teruah literally means shouting, derived from the root ruwa, which figuratively means to split the ears with sound. This sound, whether destructive or joyful, is piercing, thunderous, and deafening, emphasizing earsplitting noise over its specific source. It describes not only the sound of trumpets or ram's horns but also the full-throated roar of a throng of people shouting, particularly to God. In Numbers 23:21, through the prophecy of Balaam, God declares that the shout of a King is among Israel, signifying His presence with a noise that cannot be ignored. This shout, or teruah, draws attention to the reality of His presence among His people, making Yom Teruah a powerful reminder to focus on what the King is doing. The shout of rejoicing rises because the Creator God is their King, in their midst, favoring them due to His faithfulness. Scripture links shouting with God's presence in other instances, such as when the Israelites shouted upon seeing the Ark of the Covenant, representing His presence among them. Similarly, in I Chronicles 15, the people and their instruments shouted in celebration as King David moved the Ark with proper reverence, evoking a tremendous audible salute to God's presence. During the Triumphal Entry, fulfilling a prophecy, the multitudes shouted as Jesus Christ, their King, entered Jerusalem on a donkey, announcing His presence and bringing salvation. Their cry of "Hosanna," meaning "save now," was fitting and required, recognizing the extraordinary occasion of God among them. Jesus declared that if His people did not shout, the stones themselves would cry out, affirming the necessity of this response to His presence. In a prophecy from Psalm 118, Jesus foretold that Jerusalem would not see Him until its citizens proclaimed, "Blessed is He who comes in the name of the LORD!" When some shouted these words during His entry, He fulfilled the prophecy as their King with salvation. Yet, many religious authorities rejected Him, failing to acknowledge the shouting as pointing to the divine King, Jesus Christ.

In Isaiah's apocalypse, the act of shouting emerges as a profound expression of joy and reverence among God's remnant during the Day of the Lord. Isaiah 24:14 declares that they shall lift up their voice and sing, crying aloud for the majesty of the Lord from the trees, symbolizing their widespread presence. This shouting is not merely a reaction but a purposeful glorification of God, as seen in Isaiah 42:10-13, where the call to shout from the top of the mountains and give glory to the Lord resonates across the coastlands and wilderness, affirming the global scope of this response during His triumphant return. The significance of shouting is further highlighted in historical and prophetic contexts. Leviticus 9:24 captures the initial use of the Hebrew verb for shout, reflecting the people's response to God's glory at the consecration of the Aaronic priesthood, a precedent for the ecstatic reaction of God's people. Zephaniah 3:14-17 and Zechariah 2:10 reinforce this, urging the daughter of Zion and Israel to shout and rejoice as the Lord dwells in their midst, marking His presence and salvation with jubilant cries. Moreover, shouting serves as a distinctive mark of God's people, contrasting with the silence imposed on the godless, as noted in Zechariah 2:13 where all flesh is to be silent before the aroused Lord. This contrast underscores the unique role of the remnant in welcoming the victorious King. Luke 19:37-40 illustrates this during Christ's triumphal entry into Jerusalem, where disciples shouted praises, and Christ affirmed that even the stones would cry out if they were silent, emphasizing the inevitability and appropriateness of such acclamation. Ultimately, the remnants, described as grape gleanings and olives, are scattered worldwide to shout and sing, glorifying the Righteous One from the ends of the earth, as Isaiah 24:15-16 reveals. Their cries, echoing from distant coastlands, stand as a testimony to God's majesty amidst global devastation, fulfilling a critical function of praising the conquering King upon His return to reign gloriously on Mount Zion, as depicted in Isaiah 24:23.

In the context of Isaiah's Apocalypse, spanning chapters 24 through 27, the act of shouting and singing emerges as a profound expression of praise and triumph among God's remnants during times of deliverance and divine intervention. Isaiah 24:14-16 vividly portrays these remnants lifting their voices in song for the majesty of the Lord, crying aloud from the sea and glorifying Him from the coastlands to the ends of the earth, even amidst desolation and scarcity. This singing reflects a historical pattern among God's people, who have shouted in His presence at pivotal moments, such as at Sinai and during Christ's triumphal entry into Jerusalem in 31 AD, and are prophesied to do so again at His return as the great King. Isaiah 26 further captures the essence of this song of the remnant, particularly in the land of Judah, where a strong city, symbolizing Jerusalem, becomes the backdrop for a song of salvation and trust in the Lord as the everlasting strength, referred to as the Rock of Ages. This song echoes the Song of Moses from Exodus 15, linking the name Yah with salvation and deliverance, and emphasizing God's eternal reign with terms like forever and everlasting. Moreover, Isaiah 42:10-12 extends the call to shout and sing a new song to the Lord from the ends of the earth, encompassing the coastlands, wilderness, and mountains, as a universal declaration of His praise. This new song, while rooted in ancient sentiment, becomes fresh with each generation of singers who experience God's deliverance anew, paralleling the concept of old and new commandments that remain timeless yet novel to each believer. Finally, Isaiah 26:19 offers a divine assurance to awake and sing, even to those who dwell in the dust, promising resurrection and a renewed song of triumph as the earth casts out the dead, distinguishing God's people from their oppressors. This recurring theme of shouting and singing underscores a continuous thread of praise and hope through God's redemptive acts across time.