Pharisees.

Psalm 109:3, 4
They surround me with hateful words and attack me without cause. . . .

Matthew 12:14
But the Pharisees went out and conspired to kill Jesus.

Luke 6:11
But the scribes and Pharisees were filled with rage and began to discuss with one another what they might do to Jesus.

Luke 20:19, 20
When the scribes and chief priests realized that Jesus had spoken this parable against them, they sought to arrest Him that very hour. But they were afraid of the people. . . .

Luke 22:2
and the chief priests and scribes were looking for a way to put Jesus to death; for they feared the people.

John 11:53
So from that day on they plotted to kill Him.

Herodians.

Mark 8:15
"Watch out!" He cautioned them. "Beware of the yeast of the Pharisees and of Herod."

Mark 12:13
Later, they sent some of the Pharisees and Herodians to catch Jesus in His words.

Matthew 22:16
They sent their disciples to Him along with the Herodians. "Teacher, " they said, "we know that You are honest and that You teach the way of God in accordance with the truth. You defer to no one, because You pay no attention to external appearance.