It is narrated from Abu Uthman al-Nahdi that the Messenger of Allah (peace and blessings be upon him) went out towards a gravelly land, and Sayyiduna Abdullah bin Mas’ud (may Allah be pleased with him) was with him. He made him sit down and drew a circle around him and said:“Stay within this circle, for many people will come to you. Do not speak to them, nor will they speak to you.”Then the Messenger of Allah (peace and blessings be upon him) went in the direction he intended, and people began to come around the circle, but no one entered within the line, and they kept going towards the Messenger of Allah (peace and blessings be upon him) until, when it was the last part of the night, he (peace and blessings be upon him) returned and placed his head on my thigh as a pillow. And when he (peace and blessings be upon him) slept, he would snore. He was sleeping with his head on my thigh when a few men came, who were very handsome, wearing white clothes. Allah knows best the beauty and elegance they possessed. Then a group of them sat at his (peace and blessings be upon him) head and a group at his feet. Then they began to say among themselves,“We have not seen any servant who has been given what has been given to this Prophet (Muhammad) (peace and blessings be upon him). His eyes sleep but his heart remains awake. His example is like that of a chief who built a palace and spread a dining cloth in it and invited people to eat and drink. Then the people left.”At that moment, the Messenger of Allah (peace and blessings be upon him) also woke up and said:“Do you know who these people were?”They replied,“Allah and His Messenger know best.”He (peace and blessings be upon him) said:“They were angels.”He said:“And did you understand the example they gave?”I said: Allah and His Messenger know best. He (peace and blessings be upon him) said:“(Allah) the Most Merciful made Paradise and invited His servants to it. So whoever accepted His invitation entered His Paradise, and whoever did not accept His invitation, He will punish and torment him.”