Mark 3:6

And the Pharisees went forth
Out of the synagogue, being dreadfully galled with the reasonings of Christ, at the silence and confusion they were put to, and with the miracle he wrought, to the exposing of them, and establishing his own credit:

and straightway took counsel with the Herodians against him:
(See Gill on Matthew 22:16).

How they might destroy him:
persisting still in their evil intentions, though Christ had so fully and clearly exposed the wickedness of them: and it is to be observed, that those men who thought it was not lawful to heal a lame man on the sabbath day, yet make no scruple of meeting and consulting together on that day, and even with profane men, what measures and methods were best to take, to destroy the life of an innocent person.