Not graded
Mishkat al-Masabih 3401
وَعَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ:
" مَنْ كَاتَبَ عَبْدَهُ عَلَى مِائَةِ أُوقِيَّةٍ فَأَدَّاهَا إِلَّا عَشْرَ أَوَاقٍ أَوْ قَالَ: عَشْرَةَ دَنَانِيرَ ثُمَّ عَجَزَ فَهُوَ رَقِيقٌ "
‘Amr b. Shu'aib, on his father’s authority, told that his grandfather reported God's Messenger as saying, “If anyone has agreed to let his slave buy his freedom for a hundred uqiyas and he pays them all but ten (or he said, ten dinars), and he is then unable to complete the amount, he remains a slave.” Tirmidhi, Abu Dawud and Ibn Majah transmitted it.
Reported by At-Tirmidhi (No. 1260), Ibn Majah (No. 2519) and Ahmad (No. 6379, 6629, 6654). Cited in Mishkat al-Masabih (No. 3401).