Abu Amr Shaybani reported, that a man asked Sayyidina Ibn Mas'ud (RA), "Which
deed was the best"? He said, "I had put the same question to Allah's Messenger (SAW) and he said, "To offer Salah during the mustahabb time for it." Then I asked him, what was besides that and he said that it was to serve parents. When I asked him about anything besides, he said it was to wage jihad in Allah's path."