After the Israelites were settled in the land, the Passover festival was observed “in the place that Jehovah will choose to have his name reside,” instead of in each home or in the various cities. In time, the chosen place came to be Jerusalem.​—De 16:1-8.

Customs at Passover Time. Great preparations were made in Jerusalem when the festival was due, as it was a requirement of the Law that every male Israelite and every male of the circumcised alien residents observe the Passover. (Nu 9:9-14) This meant that vast numbers would be making the journey to the city for some days in advance. They would come before the Passover in order to cleanse themselves ceremonially. (Joh 11:55) It is said that men were sent out about a month early to prepare the bridges and put the roads in good order for the convenience of the pilgrims. Since contact with a dead body rendered a person unclean, special precautions were taken to protect the traveler. As it was a practice to bury persons in the open field, if they died there, the graves were made conspicuous by being whitened a month ahead. (The Temple, by A. Edersheim, 1874, pp. 184, 185) This supplies background for Jesus’ words to the scribes and Pharisees, that they resembled “whitewashed graves.”​—Mt 23:27.

Accommodations were made available in the homes for those coming to Jerusalem for Passover observance. In an Oriental home all the rooms could be slept in, and several persons could be accommodated in one room. Also, the flat roof of the house could be used. Added to this is the fact that numbers of the celebrants obtained accommodations outside the city walls, especially at Bethphage and Bethany, two villages on the slopes of the Mount of Olives.​—Mr 11:1; 14:3.