Now after two days was the feast of the passover and the unleavened bread; literally, the passover and the unleavened τό πάσχα καὶ τὰ ἄζυμα. It was one and the same festival. The killing of the Paschal lamb took place on the first of the seven days during which the festival lasted, and during the whole of which they used unleavened bread.
Josephus describes it as "the festival of the unleavened, called Phaska by the Jews." The chief priests and the scribes. St. Matthew (Matthew 26:3) says, "The chief priests and the elders of the people."
The two classes in the Sanhedrim who actually combined to put our Lord to death were those here mentioned by St. Mark. They sought how they might take him with subtlety ( ἐν δόλῳ), and kill him. It is, literally, they were seeking ( ἐλήτουν).
The verb with its tense implies continuous and eager desire. They used subtlety, because they feared lest he should escape out of their hands. Moreover they feared the people, lest they should fight for him, and not suffer him to be taken.