Prayer (Kitab Al-Salat)
2/149. Chapter:
Standing Up In The Single (Odd Numbered Rak'ah)
Sunan Abi Dawud
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا هُشَيْمٌ، عَنْ خَالِدٍ، عَنْ أَبِي قِلاَبَةَ، عَنْ مَالِكِ بْنِ الْحُوَيْرِثِ، أَنَّهُ رَأَى النَّبِيَّ صلى الله عليه وسلم إِذَا كَانَ فِي وِتْرٍ مِنْ صَلاَتِهِ لَمْ يَنْهَضْ حَتَّى يَسْتَوِيَ قَاعِدًا .
Abu Qilabah said: Malik b. al-Huwairith saw that the prophet (may peace by upon him) would not stand at the end of the first or the third rak’ah until he sat down straight.
Reference : Sunan Abi Dawud 844In-book reference : Book 2, Hadith 454English translation : Book 2, Hadith 843