In order to accuse Jesus, they were watching to see if He would heal on the Sabbath.

Matthew 12:10
and a man with a withered hand was there. In order to accuse Jesus, they asked Him, "Is it lawful to heal on the Sabbath?"

Mark 3:3
Then Jesus said to the man with the withered hand, "Stand up among us."

Luke 6:7
Looking for a reason to accuse Jesus, the scribes and Pharisees were watching Him closely to see if He would heal on the Sabbath.

Luke 11:54
waiting to catch Him in something He might say.

Luke 14:1
One Sabbath, Jesus went to eat in the home of a leading Pharisee, and those in attendance were watching Him closely.

Luke 20:20
So they watched Him closely and sent spies who pretended to be sincere. They were hoping to catch Him in His words in order to hand Him over to the rule and authority of the governor.

John 8:6
They said this to test Him, in order to have a basis for accusing Him. But Jesus bent down and began to write on the ground with His finger.

And they watched him, whether he would heal him on the sabbath day; that they might accuse him.