Bamidbar (Numbers): Behaalotecha > Ch 9
Children of Israel celebrate Passover for the first time
The Lord spoke to Moses in the Sinai Desert, in the 2nd year of their exodus from the land of Egypt, in the first month, saying:
The children of Israel shall make the Passover sacrifice in its appointed time. On the afternoon of the fourteenth of this month, you shall make it in its appointed time; in accordance with all its statutes and all its ordinances you shall make it.
Passover must be celebrated by all, including those who travel, those who are ritually unclean, converts & residents of the land
Any person who becomes unclean from [contact with] the dead, or is on a distant journey, whether among you or in future generations, he shall make a Passover sacrifice for the Lord. In the second month, on the fourteenth day, in the afternoon, they shall make it; they shall eat it with unleavened cakes and bitter herbs.
They shall not leave over anything from it until the next morning, and they shall not break any of its bones. They shall make it in accordance with all the statutes connected with the Passover sacrifice.
But the man who was ritually clean and was not on a journey, yet refrained from making the Passover sacrifice, his soul shall be cut off from his people, for he did not bring the offering of the Lord in its appointed time; that person shall bear his sin.
If a proselyte dwells with you, and he makes a Passover sacrifice to the Lord, according to the statutes of the Passover sacrifice and its ordinances he shall make it. One statute shall apply to you, to the proselyte and to the native-born citizen.
Cloud of G-d guides the Children of Israel when to travel and when to encamp
On the day the Mishkan was erected, the cloud covered the Mishkan, which was a tent for the Testimony, and at evening, there was over the Mishkan like an appearance of fire, [which remained] until morning. So it was always, the cloud covered it and there was an appearance of fire at night.
And according to the cloud's departure from over the Tent, and afterwards, the children of Israel would travel, and in the place where the cloud settled, there the children of Israel would encamp.
Whether it was for two days, a month or a year, that the cloud lingered to hover over the Mishkan, the children of Israel would encamp and not travel, and when it departed, they traveled. At the Lord's bidding they would encamp, and at the Lord's bidding they would travel; they kept the charge of the Lord by the word of the Lord through Moses.