Theophylact of Ohrid, on Acts 2:33

“Being exalted therefore by the right hand of God, and having received of the Father the promise of the Holy Ghost, he hath poured forth this which you see and hear.”

“By the expression "having been exalted," David indicated the ascension and that He (Jesus) is in the heavens, but even this was not clear at first. Look: at the beginning of his speech, when he also brought the prophet Joel as a witness, he did not say that Christ sent the Holy Spirit, but said that the Father sent Him. But when he had reminded them both of the signs of Christ and of what had been done against Christ, and when he had boldly declared the truth about His resurrection, then at last he says that Christ poured out the Holy Spirit, that consequently the prophet spoke of Him: "And it shall come to pass in the last days" (v. 17). By "promise" he means either the one He Himself promised to the apostles, or the one which the Father promised to Jesus before the cross and sufferings. And since Peter was about to declare a great and lofty truth—that Christ poured out the Holy Spirit—he obscures it by saying that the Father gave Him this promise, because no matter what anyone says, if he concludes his word without benefit, he speaks in vain and to no purpose. Peter also shows that the cross not only did not humble Jesus, but gave Him even more splendor. If then, according to the voice of John: "He will baptize you with the Holy Spirit and fire" (Matt. 3:11), the Father gave Him the promise, then now He has fulfilled the promise.”

Imported from an open dataset — not yet checked against the printed edition.