Charles H. Spurgeon on Psalms 89:26

He shall cry unto me, thou art my father. When did David call God his Father? It is striking that we do not find anywhere in the Old Testament that the patriarchs or prophets called God their Father. You do not find them addressing Him as Father: they did not know him as such. This verse is unintelligible in reference to David; but in regard to the True David it is exactly what he did say, —"My Father, and your Father; my God, and your God." Never until Christ uttered these words, never until he appeared on earth in humanity as the Son of God, did any man or any child of humanity address God in this endearing character. It was after Christ said, "I ascend unto my Father, and your Father", that believers were enabled to look up to God and to say, "Abba, Father". Here you see distinctly that this applies to Christ. He was the first to say this: David did not say it. If there were no other proof in the whole Psalm, that one clause would be a demonstration to me that no other man than the Lord Jesus Christ can be here spoken of. —Capel Molyneux, 1855.