Anas bin Malik reported,

On Monday, the Messenger of Allah ﷺ drew back the curtain of the chamber and saw Abu Bakr leading the people in prayer. I looked at his face, and it was as though it were a page of the Mushaf, and he was smiling. We nearly became distracted in our prayer out of joy at seeing the Messenger of Allah ﷺ. Abu Bakr started to step back, but he gestured to him to stay where he was. Then he let the curtain fall, and he passed away that same day.Umar then stood and said, "The Messenger of Allah ﷺ has not died. Rather, his Lord has sent for him just as He sent for Musa, who remained away from his people for forty nights. By Allah, I do hope that the Messenger of Allah ﷺ will live long enough to cut off the hands and tongues of certain men among the hypocrites who claim," or he said, "who say, that the Messenger of Allah ﷺ has died."

حدثنا عبد الرازق عن معمر قال قال الزهري و

أخبرني أنس بن مالك قال

لما كان يوم الاثنين كشف رسول الله ﷺ ستر الحجرة فرأى أبا بكر وهو يصلي بالناس قال فنظرت إلى وجهه كأنه ورقة مصحف وهو يتبسم قال وكدنا أن نفتتن في صلاتنا فرحا لرؤية رسول الله ﷺ فأراد أبو بكر أن ينكص فأشار إليه أن كما أنت ثم أرخى الستر فقبض من يومه ذلك فقام عمر فقال إن رسول الله ﷺ لم يمت ولكن ربه أرسل إليه كما أرسل إلى موسى فمكث عن قومه أربعين ليلة والله إني لأرجو أن يعيش رسول الله ﷺ حتى يقطع أيدي رجال من المنافقين وألسنتهم يزعمون أو قال يقولون إن رسول الله ﷺ قد مات