Ibn Shihab (may Allah have mercy on him) said: The Prophet (peace and blessings be upon him) passed away while the matter was like that, and it remained like that at the beginning of the caliphate of Sayyiduna Abu Bakr and Sayyiduna Umar (may Allah be pleased with them both).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4600