If.

Mark 11:23
"Truly I tell you that if anyone says to this mountain, 'Be lifted up and thrown into the sea, ' and has no doubt in his heart but believes that it will happen, it will be done for him.

2 Chronicles 20:20
Early in the morning they got up and left for the Wilderness of Tekoa. As they set out, Jehoshaphat stood up and said, "Hear me, O people of Judah and Jerusalem. Believe in the LORD your God, and you will be upheld; believe in His prophets, and you will succeed."

Matthew 17:20
"Because you have so little faith, " He answered. "For truly I tell you, if you have faith the size of a mustard seed, you can say to this mountain, 'Move from here to there, ' and it will move. Nothing will be impossible for you."

Matthew 21:21, 22
"Truly I tell you, " Jesus replied, "if you have faith and do not doubt, not only will you do what was done to the fig tree, but even if you say to this mountain, 'Be lifted up and thrown into the sea, ' it will happen. . . .

Luke 17:6
And the Lord answered, "If you have faith the size of a mustard seed, you can say to this mulberry tree, 'Be uprooted and planted in the sea, ' and it will obey you.

John 4:48-50
Jesus said to him, "Unless you people see signs and wonders, you will never believe." . . .

John 11:40
Jesus replied, "Did I not tell you that if you believed, you would see the glory of God?"

Acts 14:9
This man was listening to the words of Paul, who looked intently at him and saw that he had faith to be healed.

Hebrews 11:6
And without faith it is impossible to please God, because anyone who approaches Him must believe that He exists and that He rewards those who earnestly seek Him.