Numbers 9:4-6  Jubilee Bible 2000

⁴ And Moses spoke unto the sons of Israel that they should keep the passover.

⁵ And they kept the passover on the fourteenth day of the first month between the two evenings in the wilderness of Sinai; according to all that the LORD commanded Moses, so did the sons of Israel.

⁶ And there were certain men, who were defiled by the dead body of a man, that they could not keep the passover on that day; and they came before Moses and before Aaron on that day;