It is narrated from Hazrat Umm Salamah (may Allah be pleased with her) that sometimes the Prophet (peace and blessings be upon him) would be in a state of janabah at the time of morning in the month of Ramadan, then he would perform ghusl and complete the fast for the rest of the day.
Hadith Referenceمسند احمد / مسند النساء / 26667
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لضعف صالح، وقد اختلف عليه فيه