حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، حَدَّثَنَا شُعْبَةُ، عَنْ سَعْدِ بْنِ إِبْرَاهِيمَ، عَنْ أَبِي عُبَيْدَةَ، عَنْ أَبِيهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ فِي الرَّكْعَتَيْنِ الأُولَيَيْنِ كَأَنَّهُ عَلَى الرَّضْفِ ‏.‏ قَالَ قُلْتُ حَتَّى يَقُومَ قَالَ حَتَّى يَقُومَ ‏.‏

Narrated Abdullah ibn Mas'ud: The Prophet (PBUH) was in the first two rak'ahs as though he were on heated stones. The narrator Shu'bah said: We said: Till he (the Prophet) got up. Translation Not Available

Book Ref: Sunan Abi Dawud Book 2 Hadith 995
Web Ref:  Sunan Abi Dawud Book 3 Hadith 990