Numbers 9:5-7

Darby Translation

⁵ And they held the passover in the first [month] on the fourteenth day of the month, between the two evenings, in the wilderness of Sinai: according to all that Jehovah had commanded Moses, so did the children of Israel.

⁶ And there were men, who were unclean through the dead body of a man, and could not hold the passover on that day; and they came before Moses and before Aaron on that day.

⁷ And those men said to him, We are unclean by reason of the dead body of a man: why are we kept back, that we may not present the offering of Jehovah at its set time among the children of Israel?