See the notes at Matthew 12:11.
Which of you ... - In this way Jesus refuted the notion of the Pharisees. If it was lawful to save an ox on the Sabbath, it was also to save the life of a man. To this the Jews had nothing to answer.
Related Commentaries of Luke 14:5
Luke 14:5-6
5 And answered them, saying,Which of you shall have an ass or an ox fallen into a pit, and will not straightway pull him out on the sabbath day?
6 And they could not answer him again to these things.