Numbers 9:2-7

CLV(i) 2 The sons of Israel shall observe the passover at its appointed time. 3 On the fourteenth day of this month, between the evening hours, you shall observe it at its appointed time according to all its statutes, and according to all its customs shall you prepare it. 4 Then Moses spoke to the sons of Israel to observe the passover. 5 So they observed the passover in the first month on the fourteenth day of the month, between the evening hours, in the wilderness of Sinai. According to all that Yahweh had instructed Moses, so did the sons of Israel. 6 And it came to be that some men who became unclean by touching a deceased soul of a human were not able to prepare the passover on that day. Then they came near before Moses and before Aaron on that day. 7 Those men said to him:We are unclean by touching a deceased soul of a human. Why should we be disadvantaged by failing to offer the approach present of Yahweh at its appointed time in the midst of the sons of Israel?