Not graded
Mishkat al-Masabih 3045
وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «ابْنُ أُخْتِ الْقَوْمِ مِنْهُم».
He reported God’s Messenger as saying, “A sister’s son has blood- relationship to her family.” (Bukhari and Muslim.)
Cited in Mishkat al-Masabih (No. 3045).