John Gill Commentary Luke 6:8

"But he knew their thoughts; and he said to the man that had his hand withered, Rise up, and stand forth in the midst. And he arose and stood forth." — Luke 6:8 (ASV)

But he knew their thoughts
Being the omniscient God; though they had said nothing of their intentions, he knew what they designed, should he heal the man with his withered hand, as they expected he would:

and said to the man which had the withered hand, rise up, and stand
forth in the midst .
The Syriac and Persic versions add, "of the synagogue", and which is the true sense; (See Gill on Mark 3:3)

and he arose and stood forth ;
he rose up from his seat, and stood up in the midst of the synagogue, and of the people, that he might be seen of all.