John 17:20

Neither pray I for these alone--This very important explanation, uttered in condescension to the hearers and readers of this prayer in all time, is meant not merely of what follows, but of the whole prayer. them also which shall believe--The majority of the best manuscripts read "which believe," all future time being viewed as present, while the present is viewed as past and gone.

Next to their purity he prays for their unity; for the wisdom from above is first pure, then peaceable; and amity is amiable indeed when it is like the ointment on Aaron's holy head, and the dew on Zion's holy hill. Observe, I. Who are included in this prayer (Joh 17:20): "Not these only, not these only that are now my disciples" (the eleven, the seventy, with others, men and women that followed him when he was here on earth), "but for those also who shall believe on me through their word, either preached by them in their own day or written by them for the generations to come; I pray for them all, that they all may be one in their interest in this prayer, and may all receive benefit by it." Note, here, 1. Those, and those only, are interested in the mediation of Christ, that do, or shall, believe in him. This is that by which they are described, and it comprehends all the character and duty of a Christian. They that lived then, saw and believed, but they in after ages have not seen, and yet have believed. 2. It is through the word that souls are brought to believe on Christ, and it is for this end that Christ appointed the scriptures to be written, and a standing ministry to continue in the church, while the church stands, that is, while the world stands, for the raising up of a seed. 3. It is certainly and infallibly known to Christ who shall believe on him. He does not here pray at a venture, upon a contingency depending on the treacherous will of man, which pretends to be free, but by reason of sin is in bondage with its children; no, Christ knew very well whom he prayed for, the matter was reduced to a certainty by the divine prescience and purpose; he knew who were given him, who being ordained to eternal life, were entered in the Lamb's book, and should undoubtedl…

17:20 Jesus was praying for other sheep who were not yet in his flock (10:16). These are the believers through the centuries who have come to faith through the witness of Jesus’ disciples.