Luke 18:1 KJV

And he spake a parable unto them to this end , that men ought always to pray, and not to faint;

Mark 11:23 KJV

For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith.