أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ أَنْبَأَنَا هُشَيْمٌ، عَنْ خَالِدٍ، عَنْ أَبِي قِلاَبَةَ، عَنْ مَالِكِ بْنِ الْحُوَيْرِثِ، قَالَ رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يُصَلِّي فَإِذَا كَانَ فِي وَتْرٍ مِنْ صَلاَتِهِ لَمْ يَنْهَضْ حَتَّى يَسْتَوِيَ جَالِسًا ‏.‏

It was narrated that Malik bin Al-Huwairith said: "I saw the Messenger of Allah (PBUH) pray, and when he was in an odd-numbered rak'ah, he did not get up until he had settled in a sitting position." Translation Not Available

Book Ref: Sunan An Nisai Book 12 Hadith 1152
Web Ref:  Sunan An Nisai Vol 2 Book 12 Hadith 1153