Complex sentence: Ayyubid Sultan Mas'ud Yusuf left for Mecca in 1228 never to return other sources suggest that he was forced to leave for Egypt instead in 1123.
Split into simpler sentences: Ayyubid Sultan Mas'ud Yusuf left for Mecca in 1228 never to return. Other sources suggest that he was forced to leave for Egypt instead in 1123.