Numbers 9:1-3

LXX2012(i) 1 And the Lord spoke to Moses in the wilderness of Sina in the second year after they had gone forth from the land of Egypt, in the first month, saying, 2 Speak, and let the children of Israel keep the passover in its season. 3 On the fourteenth day of the first month at even, you shall keep it in its season; you shall keep it according to its law, and according to its ordinance.