Answer

Mark 11:20-25
In the morning, as they went along, they saw the fig tree withered from the roots. Peter remembered and said to Jesus, "Rabbi, look! The fig tree you cursed has withered! "Have faith in God," Jesus answered. "I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours. And when you stand praying, if you hold anything against anyone, forgive him, so that your Father in heaven may forgive you your sins."—(NIV) New International Version