The Jewish leaders planned how they could arrest Jesus without starting a riot.

Mark 14:1-2

14 It was only two days before the people ◄celebrated/started to celebrate► for one week the festival which they called Passover. During those days they also celebrated the festival of ◄Unleavened Bread/eating bread that had no yeast in it►. The chief priests and the men who taught the Jewish laws were planning how they could seize Jesus secretly. They wanted to accuse him in front of the Roman authorities so that they would execute him. 2 But they were saying to one another, “We must not do it during the celebration, because, if we do it then, the people will be very angry with us and riot!”