Numbers 9:6-10

American Standard Version

⁶ And there were certain men, who were unclean by reason of the dead body of a man, so that they could not keep the passover on that day: and they came before Moses and before Aaron on that day: ⁷ and those men said unto him, We are unclean by reason of the dead body of a man: wherefore are we kept back, that we may not offer the oblation of Jehovah in its appointed season among the children of Israel? ⁸ And Moses said unto them, Stay ye, that I may hear what Jehovah will command concerning you.

⁹ And Jehovah spake unto Moses, saying, ¹⁰ Speak unto the children of Israel, saying, If any man of you or of your generations shall be unclean by reason of a dead body, or be on a journey afar off, yet he shall keep the passover unto Jehovah.