Bamidbar 9:4-6

Orthodox Jewish Bible

⁴ And Moshe spoke unto the Bnei Yisroel, that they should observe the Pesach.

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;