Galatians 1:18

1:18 Then after three years I went up to Jerusalem to visit Cephas and get information from him, and I stayed with him fifteen days.

Acts 9:20-25

9:20 and immediately he began to proclaim Jesus in the synagogues, saying, “This man is the Son of God.” 9:21 All who heard him were amazed and were saying, “Is this not the man who in Jerusalem was ravaging those who call on this name, and who had come here to bring them as prisoners to the chief priests?” 9:22 But Saul became more and more capable, and was causing consternation among the Jews who lived in Damascus by proving that Jesus is the Christ.

Saul’s Escape from Damascus

9:23 Now after some days had passed, the Jews plotted together to kill him, 9:24 but Saul learned of their plot against him. They were also watching the city gates day and night so that they could kill him. 9:25 But his disciples took him at night and let him down through an opening in the wall by lowering him in a basket.