Luke 6:7
The Pharisees and the teachers of the law were looking for a reason to accuse Jesus, so they watched him closely to see if he would heal on the Sabbath — the watching is hostile surveillance: looking for (paraterountes, watching carefully) a reason to accuse. The man's presence in the synagogue is the Pharisees' opportunity — they want to know if Jesus will heal on the Sabbath so they can bring charges.