Matthew 21:18-21

Now in the morning as he returned to the city, he hungered. And seeing a fig tree by the way side, he came to it, and found nothing thereon, but leaves only; and he saith unto it, Let there be no fruit from thee henceforward for ever. And immediately the fig tree withered away. And when the disciples saw it, they marvelled, saying, How did the fig tree immediately wither away? And Jesus answered and said unto them, Verily I say unto you, If ye have faith, and doubt not, ye shall not only do what is done to the fig tree, but even if ye shall say unto this mountain, Be thou taken up and cast into the sea, it shall be done.