John Mark
Mark 11:24ESV·traditional attribution

Therefore I tell you, whatever you ask in prayer, believe that you have received it, and it will be yours.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. Christ's cursing the fruitless fig-tree. He had a convenient resting-place at Bethany, and therefore thither he went at resting-time; but his work lay at Jerusalem, and thither therefore he returned in the morning, at working-time; and so intent was he upon his work, that he went out from Bethany without breakfast, which, before he was gone far, he found the want of...

Commenting on Mark 11:12-26

John Gill Reformed Baptist @doctorgill

And when ye stand praying,.... Are about to engage in that work, or are engaged in it, performing it in such a posture; for standing was an usual posture in praying; See Gill on Mat 6:5; forgive, if ye have ought against any, that your Father also in heaven may forgive you your trespasses.

Geneva Bible Notes Reformed @genevanotes

Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive [them], and ye shall have [them]. (f) Literally, "that you receive it", speaking in the present tense, to show the certainty of the thing, and that it will indeed be performed.