Sahih (Sahih Muslim)
حَدَّثَنِي أَحْمَدُ بْنُ عَبْدِ الرَّحْمَنِ بْنِ وَهْبٍ، حَدَّثَنِي عَمِّي عَبْدُ اللَّهِ، حَدَّثَنِي دَاوُدُ بْنُ قَيْسٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، بِهَذَا الإِسْنَادِ وَفِي مَعْنَاهُ قَالَ " يَسْجُدُ سَجْدَتَيْنِ قَبْلَ السَّلاَمِ " . كَمَا قَالَ سُلَيْمَانُ بْنُ بِلاَلٍ .
This hadith has been narrated by Zaid b. Aslam with the same chain of transmitters and he said:He should perform two prostrations before the salutation, as it was mentioned by Sulaiman b. Bilal