John the Apostle
John 14:13BSB·traditional attribution

And I will do whatever you ask in My name, so that the Father may be glorified in the Son.

John Calvin Reformed @genevareformer

13. And whatever you ask in my name, that I will do. By these words He plainly declares that he will be the Author of all that shall be done by the hands of the Apostles. But it may be asked, was he not even then the Mediator in whose name men ought to pray to the Father?

Matthew Henry Presbyterian @wholebiblehenry

The disciples, as they were full of grief to think of parting with their Master, so they were full of care what would become of themselves when he was gone; while he was with them, he was a support to them, kept them in countenance, kept them in heart; but, if he leave them, they will be as sheep having no shepherd, an easy prey...

Commenting on John 14:12-14

John Gill Reformed Baptist @doctorgill

And whatsoever ye shall ask in my name,.... Whether it be for assistance in preaching of the Gospel; or for the performance of miraculous operations in confirmation of it; or for success to attend it; or for any blessings whatsoever, whether for themselves or others: that will I do; he does not say, that he would be a Mediator between God, and them, an advocate...