Hadith 4806
Narrated Al-Awwam: I asked Muhajid regarding the prostration in Surat Sa`d. He said, "Ibn `Abbas was asked the same question and he said, 'Those are they (the prophets) whom Allah had Guided. So follow their guidance." (6.90) Ibn `Abbas used to perform a prostration (on reading this Sura).
Hadith 4807
حَدَّثَنِي
مُحَمَّدُ بْنُ عَبْدِ اللَّهِ ، حَدَّثَنَا
مُحَمَّدُ بْنُ عُبَيْدٍ الطَّنَافِسِيُّ ، عَنْ
الْعَوَّامِ ، قَالَ : " سَأَلْتُ مُجَاهِدًا عَنْ سَجْدَةٍ فِي ص ؟ فَقَالَ : سَأَلْتُ
ابْنَ عَبَّاسٍ مِنْ أَيْنَ سَجَدْتَ ؟ فَقَالَ : أَوَ مَا تَقْرَأُ وَمِنْ ذُرِّيَّتِهِ دَاوُدَ وَسُلَيْمَانَ أُولَئِكَ الَّذِينَ هَدَى اللَّهُ فَبِهُدَاهُمُ اقْتَدِهْ سورة الأنعام آية 90 ، فَكَانَ دَاوُدُ مِمَّنْ أُمِرَ نَبِيُّكُمْ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنْ يَقْتَدِيَ بِهِ ، فَسَجَدَهَا دَاوُدُ عَلَيْهِ السَّلَام ، فَسَجَدَهَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ .
Narrated Al-Awwam: I asked Mujahid regarding the prostration in Surat Sa`d. He said, "I asked Ibn `Abbas, 'What evidence makes you prostrate?' He said, "Don't you recite:--'And among his progeny, David and Solomon..(6.84). Those are they whom Allah had guided. So follow their guidance.' (6.90) So David was the one of those prophets whom Prophet (Muhammad) was ordered to follow. David prostrated, so Allah's Messenger (Muhammad) performed this prostration too.'