Sahih al-Bukhari 4806

Narrated Al-Awwam:

I asked Muhajid regarding the prostration in Surat Sad. 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).

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا غُنْدَرٌ، حَدَّثَنَا شُعْبَةُ، عَنِ الْعَوَّامِ، قَالَ سَأَلْتُ مُجَاهِدًا عَنِ السَّجْدَةِ، فِي ص قَالَ سُئِلَ ابْنُ عَبَّاسٍ فَقَالَ أُولَئِكَ الَّذِينَ هَدَى اللَّهُ فَبِهُدَاهُمُ اقْتَدِهْ. وَكَانَ ابْنُ عَبَّاسٍ يَسْجُدُ فِيهَا.