FUGITIVES (1) A fugitive slave, either male of female, is call abiq ابق. The capture of a fugitive slave is a laudable act, and the captor is entitled to a reward of forty dirhams. (2) A fugitive on account of religion is called muhajir محاجر. Special blessings are promised on those who flee their country on account of their being Muslims.
Surah iv 101: “Whosoever flees in the way of God shall find in the earth a spacious refuge.”
Surah xxii 57: “Those who flee in God’s way and then are slain or die, God will provide them with a godly provision.” [SLAVES, MUHAJIR.]

Based on Hughes, Dictionary of Islam