Mark 12:13
Then the Pharisees sent certain ones of their number [See Matt. 22:15-16] along with the Herodians [Note: This refers to members of a political party favoring King Herod] to attempt to trap Him by what He said.
Mark 3:6
And the Pharisees immediately went out and conferred with the Herodians against Jesus, plotting how they could kill Him. [Note: These Herodians were members of a political party favoring King Herod]
Luke 11:54
[and] plotting to trap Him by something He might say.
Luke 20:20-26
And they kept watching Him, [even] sending informants who pretended to be good [men], in order to get hold of something He said so they could turn Him over to the ruling authority of the governor.
Mark 8:15
Then Jesus ordered them, saying, "Pay attention and watch out for the leavening [effect] of the Pharisees and Herod." [Note: By "Herod" is probably meant the Herodians, who were a party favorable to King Herod and, along with the Pharisees and Sadducees, were out to get Jesus. See Matt. 16:6].
Matthew 16:6
Jesus said to them, "Pay attention and watch out for the leavening [effect] of the Pharisees and Sadducees."
Matthew 22:15-22
Then the Pharisees conspired as to how they could trap Jesus by what He said.