Mark 11:21-23

And remembering, Peter said to Him, “Rabbi (Master), look! The fig tree which You cursed has withered!” Jesus replied, “Have faith in God [constantly]. I assure you and most solemnly say to you, whoever says to this mountain, ‘Be lifted up and thrown into the sea!’ and does not doubt in his heart [in God’s unlimited power], but believes that what he says is going to take place, it will be done for him [in accordance with God’s will]. [Matt 17:20; Luke 17:6; 1 John 5:14]