Luke 22:7-13

Then came the day of unleavened bread, when the passover must be killed They called the day on which the passover was killed, one of the days of unleavened bread, and the first day thereof, because it was preparatory to that feast; though, properly speaking, the first day began with the passover-supper. This appears likewise from Josephus, who, making use of the vulgar computation, tells us, that the feast of unleavened bread lasted eight days; whereas, in the law, it was ordered to be kept only seven days. Thus Exodus 12:19: Seven days shall there be no leaven found in your houses. He sent Peter and John From the place where he had spent the night before in retirement with them; saying, Go and prepare us the passover Go, buy a lamb for us, and get it killed and roasted, and make the other preparations, that we may, once more, eat it together. They said, Where wilt thou that we prepare? See on Matthew 26:17, and Mark 14:10: where this paragraph is considered at large.