William Burkitt on Matthew 12:9

Here we have another dispute betwixt our Saviour and the Pharisees concerning the sabbath; whether it be a breach of that day, mercifully to heal a person having a withered hand? Christ confutes them from their own practice, telling the Pharisees, that they themselves judged it lawful to help out a sheep, or an ox, if fallen into a pit on that day: how much more ought the life of a man to be preferred!

Here we may remark, how inveterate a malice the Pharisees had against our Saviour: when they could find no crime to charge him with, they blame him for working a merciful and miraculous cure upon the sabbath-day. When envy and malice (which are evermore quick-sighted) can find no occasion of quarrel, they will invent one, against the innocent.