Galatians 1:18

18ThenἜπειταafterμετὰyearsἔτηthreeτρίαI went upἀνῆλθονtoεἰςJerusalemἹεροσόλυμαto make acquaintance withἱστορῆσαιCephasΚηφᾶν,andκαὶI remainedἐπέμειναwithπρὸςhimαὐτὸνdaysἡμέραςfifteenδεκαπέντε·

Then after three years I went up to Jerusalem to make acquaintance with Cephas, and I remained with him fifteen days.