Êxodo - Capítulo 13, Versículo 5
And it will be that, when the Lord takes you into the land of the Canaanite and the Hittite and the Amorite and the Hivite and the Jebusite, the land which he made an oath to your fathers that he would give you, a land flowing with milk and honey, you will do this act of worship in this month.