When the Prophet (ﷺ) arrived at Al-Madîna, he dismounted at the upper side of Al-Madîna amongst the tribe called Banû 'Amr bin ' Auf. He stayed there for fourteen nights. Then he sent for Banî An-Najjâr and they came armed with their swords. As if I am looking (just now) as the Prophet (ﷺ) was sitting over his (mount) with Abu Bakr riding behind him and all Banû An-Najjâr around him till he dismounted at the courtyard of Ayûb's house. The Prophet (ﷺ) loved to offer (prayer) wherever the time for As-Salât (the prayer) was due even at sheep-folds. Later on he ordered that a mosque should be built and sent for some people of Banû An-Najjâr and said, O Banû An-Najjâr ! Suggest to me the price of this (walled) piece of land of yours." They replied, "No ! By Allâh ! We do not demand its price except from Allâh." Anas added: There were graves of pagans in it and some of it were unlevelled and there were some date-palm trees in it. The Prophet (ﷺ) ordered that the graves of the pagans be dug out and the unlevelled land be levelled and the date-palm trees be cut down. (So all that was done). They aligned these cut date-palm trees towards the Qiblah of the mosque (as a wall) and they also built two stone side-walls (of the mosque). His companions brought the stones while reciting some poetic verses. The Prophet (ﷺ) was with them and he kept on saying, "There is no goodness except that of the Hereafter, O Allah ! So please forgive the (helpers) and Al-Muhajir (the emigrants)." [1:420-O.B.]