Galatians 1:17-18

1:17 nor did I go up to Jerusalem to see those who were apostles before me, but right away I departed to Arabia, and then returned to Damascus.

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.

Galatians 4:25

4:25 Now Hagar represents Mount Sinai in Arabia and corresponds to the present Jerusalem, for she is in slavery with her children.