Jesus did not regret helping the Samaritan woman. This was just the sort of work He had come to do: to bring people to repentance and faith.
BibleGateway: John 4:27-38 ESV Text: John 4:27-38 John 4:27–38 (Listen) 27 Just then his disciples came back. They marveled that he was talking with a woman, but no one said, “What do you seek?” or, “Why are you talking with her?” 28 So the woman left her water jar and went away into town and said to the people, 29 “Come, see a man who told me all that I ever did. Can this be the Christ?” 30 They went out of the town…