Rashid bin Sa'd (may Allah have mercy on him) said: Sayyiduna Abu Umamah (may Allah be pleased with him) met me, took my hand and said: The Messenger of Allah (peace and blessings be upon him) met me, he (peace and blessings be upon him) took my hand and said: "O Abu Umamah, among the believers there are some for whom my heart softens."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7468