The Prophet (peace and blessings be upon him) said:
"These two are my sons and the sons of my daughter. O Allah, I love them both, so love them and love whoever loves them."
Hadith Referenceصحیح الجامع الصغیر / حرف الهاء / 7003
Hadith Gradingالألبانی:حسن
Hadith Takhrij[ت حب] عن أسامة بن زيد. المشكاة ٦١٥٦.