What did Jesus do when he saw a fig tree with only leaves and no fruit?

Hi killed it.

Now in the morning as he returned into the city, he hungered.

And when he saw a fig tree in the way, he came to it, and found nothing thereon, but leaves only, and said unto it, Let no fruit grow on thee henceforward for ever. And presently the fig tree withered away. Matthew 21:18-19