It is narrated from Sayyidah Umm Habibah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "I was shown what my Ummah will face after me, and the shedding of their blood. So I asked Allah to grant me the right of intercession for them, and Allah did so."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19714