Bamidbar 9:5-7

Orthodox Jewish Bible

⁵ And they observed the Pesach on the fourteenth day of the first month at twilight in the Midbar Sinai; according to all that Hashem commanded Moshe, so did the Bnei Yisroel.

⁶ And there were certain men, who were teme’im by the nefesh (dead body) of an adam, that they could not observe the Pesach on that day; and they came before Moshe and before Aharon on that day;

⁷ And those men said unto him, We are teme’im (unclean) by the nefesh of a man; but why should we be kept back, that we may not offer a korban Hashem in its appointed season among the Bnei Yisroel?