Expositor's Bible Commentary Commentary Mark 11:23

"Verily I say unto you, Whosoever shall say unto this mountain, Be thou taken up and cast into the sea; and shall not doubt in his heart, but shall believe that what he saith cometh to pass; he shall have it." — Mark 11:23 (ASV)

Since Jesus was standing on the Mount of Olives, from which the Dead Sea can be seen on a clear day, he may have been referring specifically to this mountain. Of course Jesus was speaking figuratively, saying that the greatest possible difficulties can be removed when a person has faith (cf. James 1:6).