John Gill Commentary Mark 11:22

"And Jesus answering saith unto them, Have faith in God." — Mark 11:22 (ASV)

And Jesus answering, says to them
To all the disciples; for what Peter said, he said in the name of them all; and according to Matthew, the disciples said, "how soon is the fig tree withered away?" To which this is an answer; though the Arabic version renders it, "to him"; as if the words were directed particularly to Peter:

have faith in God ;
or "the faith of God", so the Vulgate Latin, Syriac, Persic, and Ethiopic versions; that is, exercise, and make use of that faith which has God for its author, which is the work of God, and of his operation, a free grace gift of his; and which has God for its object; and is supported by his power, and encouraged by his goodness, truth, and faithfulness: and so the Arabic version renders it, "believe in God"; not only that such things may be done, as the drying up a fig tree, but those that are much greater.