عَن عمر بن أبي سَلمَة قَالَ: رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي فِي ثَوْبٍ وَاحِدٍ مُشْتَمِلًا بِهِ فِي بَيْتِ أُمِّ سَلَمَةَ وَاضِعًا طَرَفَيْهِ عَلَى عَاتِقيهِ
“Umar b. Abu Salama said that he saw God’s Messenger praying in Umm Salama’s house girded with a single garment, placing its two ends over his shoulders.*
* This is explained as meaning that the ends were each over a shoulder and under the other armpit and tied over the chest.
Abu Dharr said that he asked God’s Messenger which mosque was set up first in the earth and was told that it was the sacred mosque. He asked which came next and was told that it was the Aqsa mosque. He asked how long a space of time separated their building and the Prophet told him it was forty years, adding, “Then the earth is a mosque for you, so pray wherever you are at the time of prayer.”