Sayyidah Umm Salamah (may Allah be pleased with her) said: I bear witness that I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever loves Ali has loved me, and whoever loves me has loved Allah; and whoever hates Ali has hated me, and whoever hates me has hated Allah."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20203