Exodus 12:2-5 'This month shall be your beginning of months; it shall be the first month of the year to you. Speak to all the congregation of Israel, saying: "On the tenth of this month every man shall take for himself a lamb, according to the house of his father, a lamb for a household. And if the household is too small for the lamb, let him and his neighbor next to his house take it according to the number of the persons; according to each man's need you shall make your count for the lamb. Your lamb shall be without blemish, a male of the first year. You may take it from the sheep or from the goats.
Joshua 4:19 Now the people came up from the Jordan on the tenth day of the first month, and they camped in Gilgal on the east border of Jericho.