Najm al-Din Abu'l-Fath Salim/Sulayman ibn Muhammad al-Lukki al-Maghribi (Arabic: ﻧﺠﻢ ﺍﻟﺪﻳﻦ ﺍﺑﻮ ﺍﻟﻔﺘﺢ ﺳﻠﻴﻢ/ﺴﻠﻴﻤﺎﻥ ﺑﻦ ﻣﺤﻤﺪ ﺍﻟﻠﻜﻲ, romanized: Najm al-Dīn Abu’l-Fatḥ Salīm/Sulaymān ibn Muḥammad al-Lukkī al-Maghribī), better known as Ibn Masal (Arabic: ﺍﺑﻦ ﻣﺼﺎﻝ, romanized: Ibn Maṣāl), was a military commander and official of the Fatimid Caliphate, who served briefly as the de facto vizier of the Caliphate from 1144/45 until he was overthrown and killed by al-Adil ibn al-Sallar and his supporters in the winter of 1149/50.