33 “And many Samaritans of that city believed on Him, because of the saying of the woman, who testified, He told me all that ever I did. And when the Samaritans came to Him, they besought Him that He would tarry with them; and He tarried there two days. And many more believed because of His word; and said to the woman, Now we believe, not because of your words; for we have heard Him ourselves, and we know that this is indeed the Saviour of the world.” This also must be slightly noticed, for the lesson has come to an end.
The woman first announced Him, and the Samaritans believed her testimony; and they besought Him to stay with them, and He stayed there two days, and many more believed. And when they had believed, they said to the woman, “Now we believe, not because of your word; but we have come to know Him ourselves, and we know that this is indeed the Saviour of the world:” first by report, then by His presence. So it is today with them that are without, and are not yet Christians. Christ is made known to them by Christian friends; and just upon the report of that woman, that is, the Church, they come to Christ, they believe through this report.
He stays with them two days, that is, gives them two precepts of charity; and many more believe, and more firmly believe, on Him, because He is in truth the Saviour of the world.
Source: Tractates on the Gospel of John (New Advent)