Markus 9:22

9:22 It has often thrown him into fire or water to destroy him. But if you are able to do anything, have compassion on us and help us.”

Markus 11:23

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.

[11:23]  ¹ tn Grk “Truly (ἀμήν, amhn), I say to you.”