Sayyiduna Abu Barzah (may Allah be pleased with him) narrated: For seventeen months I offered prayer behind the Prophet (peace and blessings be upon him). Whenever he came out of his house, he would come to the door of Sayyidah Fatimah (may Allah be pleased with her) and say: The time of prayer has come; may Allah Almighty send mercy upon you; Allah Almighty intends to remove impurity from you.
Al-Tabarani recorded it; its chain contains a narrator, Umar bin Shabib al-Musalli, who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 14986