Mark 14:12-16 NIV
On the first day of the Festival of Unleavened Bread, when it was customary to sacrifice the Passover lamb, Jesus’ disciples asked him, “Where do you want us to go and make preparations for you to eat the Passover?”
So he sent two of his disciples, telling them, “Go into the city, and a man carrying a jar of water will meet you. Follow him. Say to the owner of the house he enters, ‘The Teacher asks: Where is my guest room, where I may eat the Passover with my disciples?’ He will show you a large room upstairs, furnished and ready. Make preparations for us there.”
The disciples left, went into the city and found things just as Jesus had told them. So they prepared the Passover.
NIV: New International Version