Not graded
Hisn al-Muslim (Fortress of the Muslim) 230
قَالَ النَّبِيُّ صلى الله عليه وسلم: ((اللَّهُمَّ فَأَيُّمَا مُؤْمِنٍ سَبَبْتُهُ فَاجْعَلْ ذَلِكَ لَهُ قُرْبَةً إِلَيْكَ يَوْمَ الْقِيَامَةِ)).
(O Allah, to any believer whom I have insulted, let that be cause to draw him near to You on the Day of Resurrection.)
Cited in Hisn al-Muslim (Fortress of the Muslim) (No. 230).