While Jesus was in a Synagogue, he saw a man with a deformed hand and miraculously healed him. The event was witnessed by opponents of Jesus who plotted to have Jesus killed.
As explained in the Gospel of Mark:
Then Jesus asked them, "Which is lawful on the Sabbath: to do good or to do evil, to save life or to kill?" But they remained silent.
He looked around at them in anger and, deeply distressed at their stubborn hearts, said to the man, "Stretch out your hand." He stretched it out, and his hand was completely restored. Then the Pharisees went out and began to plot with the Herodians how they might kill Jesus.
- Mark 3:1-6, NIV translation.
Read more in the book Jesus the Miracle Worker: The 46 miracles of Jesus explained in chronological order (The Jesus Books) -- now available at amazon.