عَنْ أَبِي هُرَيْرَةَ
أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «ثَلَاثَةٌ حَقٌّ عَلَى اللَّهِ عَوْنُهُمْ: الْمُكَاتَبُ الَّذِي يُرِيدُ الْأَدَاءَ وَالنَّاكِحُ الَّذِي يُرِيدُ الْعَفَافَ وَالْمُجَاهِدُ فِي سَبِيلِ اللَّهِ»
the slave whose master has agreed to let him buy his freedom when he wishes to pay the sum, the one who marries desiring to live a chaste life, and the one who fights in God’s path. Tirmidhi, Nasai and.