Mark 14:12-16
Now on the first day of the Festival of Unleavened Bread [i.e., the beginning of the Passover Festival week], when they sacrificed the Passover [lamb], Jesus' disciples said to Him, "Where do you want us to go to make preparations for you to eat the Passover meal?"
Matthew 26:17-19
Now on the first day of the Festival of Unleavened Bread [i.e., the first day of Passover week], His disciples came to Jesus, saying, "Where do you want us to make preparations for you to eat the Passover meal?"
Luke 22:7-13
Then the day came for the Festival of Unleavened Bread [to be held], on which the Passover [lamb] was to be sacrificed.
1 Corinthians 10:4
and drank the same spiritual drink [i.e., water coming from a rock supernaturally. See Ex. 17:6]. For they drank from the spiritual rock that followed them, and that rock was Christ. [Note: Besides actual water, they were refreshed from the spiritual presence of Christ].