Arabia is modern Petra
Paul says that after his call he went away into Arabia and then returned to Damascus, going up to Jerusalem only after three years. Acts does not mention the journey.
Sources
17nor did I go up to Jerusalem to the apostles who came before me, but I went into Arabia and later returned to Damascus. 18Only after three years did I go up to Jerusalem to confer with Cephas, and I stayed with him fifteen days.