Mark 11:22-23
11:22 Jesus said to them, “Have faith in God.
11:23 I tell you the truth, 1 if someone says to this mountain, ‘Be lifted up and thrown into the sea,’ and does not doubt in his heart but believes that what he says will happen, it will be done for him.
1 tn Grk “Truly (ἀμήν, amhn), I say to you.”