Galatians 1:18

“Then after three years I went up to Jerusalem, etc..] Not three years after his return to Damascus, but after his conversion; and now it was that he moved to become a member of the church at Jerusalem; but they did not care to admit him, fearing that he was not a disciple, till such time that Barnabas took him, and brought him to the Apostles Peter and James, and related his conversion and his boldness in preaching the Gospel at Damascus: his view in going up to Jerusalem at this time was partly his own safety, being obliged to fly from Damascus, but chiefly to see Peter. The Alexandrian copy, and another, read “Cephas”, and so does the Ethiopic version, the same with Peter: not to see what…”

“after three years--dating from my conversion, as appears by the contrast to "immediately" (Gal 1:16). This is the same visit to Jerusalem as in Act 9:26, and at this visit occurred the vision (Act 22:17-18). The incident which led to his leaving Damascus (Act 9:25; Co2 11:33) was not the main cause of his going to Jerusalem. So that there is no discrepancy in the statement here that he went "to see Peter"; or rather, as Greek, "to make the acquaintance of"; "to become personally acquainted with." The two oldest manuscripts read, "Cephas," the name given Peter elsewhere in the Epistle, the Hebrew name; as Peter is the Greek (Joh 1:42). Appropriate to the view of him here as the apostle…”

“Then after three years - Probably three years after his departure from Jerusalem to Damascus, not after his return to Arabia. So most commentators have understood it. Went up to Jerusalem - More correctly, as in the margin, returned. To see Peter - Peter was the oldest and most distinguished of the apostles. In Galatians 2:9, he, with James and John, is called a pillar. But why Paul went particularly to see him is not known. It was probably, however, from the celebrity and distinction which he knew Peter had among the apostles that he wished to become particularly acquainted with him. The word which is here rendered “to see” (ἱστορῆσαι historēsai) is by no means that which is commonly…”

“Then after three years - Wherein I had given full proof of my apostleship. I went to visit Peter - To converse with him. Galatians 1:19”

“1:18-20 Peter and James had fifteen days to talk with Paul about his message, which was clearly in harmony with theirs. Paul did not receive a commission from the Jerusalem church—his apostleship did not derive from Jerusalem. 1:18 three years later (or in the third year): Either three years after Paul’s conversion or after his return from Arabia. This event is probably the visit recorded in Acts 9:26-30. • to get to know Peter: Peter had something Paul did not: deep personal acquaintance with Jesus during Jesus’ earthly ministry. • Fifteen days was much too short a time for Paul to become dependent on Peter as his mentor, but plenty of time for the content of each man’s preaching to be…”

“I went up: or, I returned, Act 9:26-29, Act 22:17, Act 22:18 Galatians 1:19”