João 5:12

What man is that which said unto thee...? — They pass over the giving of the power, and quote only the command which comes under their technical prohibition. The life and strength of once-palsied limb is as nothing; the fact that this man was breaking their tradition is secondary. The real motive is a charge against Him whose power the body of the Jewish people was feeling as a life-current, quickening deadened energies, and rousing men to a sense of God’s presence in their midst. Aye, and these Jews of Judaism feel the thrill of this current all around them, though their will tries to isolate them by the coldness of unbelief from a power which they have not directed, and which they refuse to be directed by. Men and women who have been all their lives lying in moral helplessness, waiting and looking for God, yet never helped by God’s priests and rulers, are now standing and moving in the strength that their new Teacher gives. They cannot deny it, but can they prevent it? This spirit is life, but there is still the letter which killeth. It cuts them to the heart to see His power in their midst, but there is the body of Rabbinic precept and oral law. He has now crossed that. They will apply it to stamp out His work and kill Him.

Take up thy bed, and walk. — Omit “thy bed,” with the best MSS. It is inserted from the previous verse. Their passionate question expresses itself in the fewest words.