FIRST AND LAST ROW FOR PRAYERS H 1112 "The Messenger of Allah, praise and peace be upon him, instructed, 'Fill the front row, then the one next to it. If there is any shortage it should be in the last row.'" R 1112 Abu Daud with a chain up to Anas who related that the Messenger of Allah, praise and peace be upon him, said this.
1093- وعنه : أنَّ رَسُول اللهِ صلى الله عليه وآله وسلم ، قَالَ : "أتِمُّوا الصَّفَّ المُقَدَّمَ ، ثُمَّ الَّذِي يَلِيهِ ، فَمَا كَانَ مِنْ نَقْصٍ فَلْيَكُنْ في الصَّفِّ المُؤَخَّرِ" رواه أبُو دَاوُدَ بإسناد حسن .