{8} At that day ye shall ask in my name: and I say not unto you, that I will pray the Father for you:

(8) The sum of the worship of God is the invocation of the Father in the name of the Son the mediator, who is already heard for us, for whom he both abased himself, and is now also glorified.

Wesley's Notes

16:26 At that day ye shall ask - For true knowledge begets prayer. And I say not that I will pray - This in nowise implies that he will not: it means only, The Father himself now loves you, not only because of my intercession, but also because of the faith and love which he hath wrought in you.

Jamieson-Fausset-Brown Bible Commentary

26. I say not . I will pray the Father for you-as if He were not of Himself disposed to aid you: Christ does pray the Father for His people, but not for the purpose of inclining an unwilling ear.

Matthew Henry's Concise Commentary

16:23-27 Asking of the Father shows a sense of spiritual wants, and a desire of spiritual blessings, with conviction that they are to be had from God only. Asking in Christ's name, is acknowledging our unworthiness to receive any favours from God, and shows full dependence upon Christ as the Lord our Righteousness. Our Lord had hitherto spoken in short and weighty sentences, or in parables, the import of which the disciples did not fully understand, but after his resurrection he intended plainly to teach them such things as related to the Father and the way to him, through his intercession. And the frequency with which our Lord enforces offering up petitions in his name, shows that the great end of the mediation of Christ is to impress us with a deep sense of our sinfulness, and of the merit and power of his death, whereby we have access to God. And let us ever remember, that to address the Father in the name of Christ, or to address the Son as God dwelling in human nature, and reconciling the world to himself, are the same, as the Father and Son are one.