Numbers 9:6-7

6But there were some men who were 1unclean because of the 2dead person, so that they could not observe Passover on that day; so 3they came before Moses and Aaron on that day.

7Those men said to him, “Though we are unclean because of the 4dead person, why are we restrained from presenting the offering of the Lord at its appointed time among the sons of Israel?”