Numbers 9:6-13 New Revised Standard Version (NRSV)
6 Now there were certain people who were unclean through touching a corpse, so that they could not keep the passover on that day. They came before Moses and Aaron on that day, 7 and said to him, “Although we are unclean through touching a corpse, why must we be kept from presenting the Lord’s offering at its appointed time among the Israelites?” 8 Moses spoke to them, “Wait, so that I may hear what the Lord will command concerning you.”
9 The Lord spoke to Moses, saying: 10 Speak to the Israelites, saying: Anyone of you or your descendants who is unclean through touching a corpse, or is away on a journey, shall still keep the passover to the Lord. 11 In the second month on the fourteenth day, at twilight,[a] they shall keep it; they shall eat it with unleavened bread and bitter herbs. 12 They shall leave none of it until morning, nor break a bone of it; according to all the statute for the passover they shall keep it. 13 But anyone who is clean and is not on a journey, and yet refrains from keeping the passover, shall be cut off from the people for not presenting the Lord’s offering at its appointed time; such a one shall bear the consequences for the sin.