Ubayd bin Umayr reported,

Abu Musa sought permission to enter upon Umar three times, and finding him apparently occupied, he turned back. Umar said, "Did I not hear the voice of Abdullah bin Qays? Let him in."So Abu Musa was called back, and Umar asked him, "What made you do what you did?"He replied, "We were commanded to do this."Umar said, "You shall bring me proof of this, or else I will deal with you."So he went out and went to a gathering of the Ansar, and they said, "None will testify to this for you except the youngest among us." So Abu Saeed stood up and said, "We were commanded to do this."Umar then said, "This matter from the affair of the Messenger of Allah ﷺ was hidden from me. The bustle of the markets distracted me from it."

عن عبيد بن عمير

أن أبا موسى استأذن على عمر ثلاثاء، فكأنه وجده مشغولا، فرجع، فقال عمر: ألم تسمع صوت عبد الله بن قيس، ائذنوا له، فدعي له، فقال: ما حملك على ماصنعت؟ قال: إنا كنا نؤمر بهذا، قال: لتقيمن على هذا بينة أو لأفعلن، فخرج فانطلق إلى مجلس الأنصار، فقالوا: لا يشهد لك على هذا إلا أصغرنا، فقام بوسعيد، فقال: كنا نؤمر بهذا، فقال عمر: خفي علي هذا من أمر رسول الله ﷺ، ألهاني عنه الصفق بالأسواق.