Albert Barnes Commentary Matthew 9:22

"But Jesus turning and seeing her said, Daughter, be of good cheer; thy faith hath made thee whole. And the woman was made whole from that hour." — Matthew 9:22 (ASV)

Mark says that the woman, fearing and trembling, came and told him all the truth. Perhaps she feared that, from the impure nature of her disease, he would be offended that she touched him.

Be of good comfort. Jesus silenced her fears, commended her faith, and sent her away in peace. He used an endearing appellation, calling her daughter, a word of tenderness and affection, and dismissed her who had been twelve long and tedious years suffering from a weakening and offensive disease, now in an instant made whole. Her faith, her strong confidence in Jesus had been the means of her restoration. It was the power of Jesus that cured her; but that power would not have been exerted but in connection with faith. So in the salvation of a sinner. No one is saved who does not believe; but faith is the instrument, and not the power that saves.

That hour (John 4:53).