Sayyiduna Ali (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) was sent as a prophet on a Monday, and I accepted Islam on the Tuesday.
Abu Ya'la recorded it. Its chain contains Muslim bin Kaysan al-Mula'i, who suffered from confusion of memory (ikhtilat).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 14602