It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "After faith in Allah, the root (foundation) of intelligence is to treat people with love and friendliness."
Hadith Referenceالمعجم الأوسط / باب الميم / 6070
Hadith Gradingمحدثین:منكر
Hadith Takhrij«قال ابن عدي: منكر المتن «الكامل في الضعفاء، ج 7، ص 53»» «أخرجه البزار فى «مسنده» برقم: 7851»