Mark 11:20-26  NAS

As they were passing by in the morning, they saw the fig tree withered from the roots up.  Being reminded, Peter said to Him, "Rabbi, look, the fig tree which You cursed has withered."  And Jesus answered saying to them, "Have faith in God.  Truly I say to you, whoever says to this mountain, 'Be taken up and cast into the sea,' and does not doubt in his heart, but believes that what he says is going to happen, it will be granted him.  Therefore I say to you, all things for which you pray and ask, believe that you have received them, and they will be granted you.  Whenever you stand praying, forgive, if you have anything against anyone, so that your Father who is in heaven will also forgive you your transgressions.  But if you do not forgive, neither will your Father who is in heaven forgive your transgressions."