John Gill Commentary Acts 24:17

"Now after some years I came to bring alms to my nation, and offerings:" — Acts 24:17 (ASV)

Now after many years
Absence from Jerusalem; it was now about five and twenty years since his conversion, and most of this time he spent among the Gentiles; three years after it he went up to Jerusalem, and fourteen years after that, (Galatians 1:18) (2:1) but it had now been some years since he had been there:

I came to bring alms to my nation ;
the collections which were made among the Gentile churches, particularly in Macedonia, for the poor saints at Jerusalem, (Romans 15:25–27) (2 Corinthians 8:1–4) .

and offerings ;
either for the day of Pentecost, according to the usages of that feast, or the offerings on the account of the vow of the Nazarite, (Acts 21:26) . The Vulgate Latin version adds, "and vows"; unless the spiritual and evangelical sacrifices of prayer and praise can be thought to be meant, since the ceremonial law was now abrogated; though it is manifest the apostle did at some times, and in some cases, comply with the Jews in the observance of it, in order to gain some.