Hadith 1032
حَدَّثَنَا حَجَّاجٌ، حَدَّثَنَا يَعْقُوبُ، أَخْبَرَنَا أَبِي، عَنِ ابْنِ إِسْحَاقَ، حَدَّثَنِي مُحَمَّدُ بْنُ مُسْلِمٍ الزُّهْرِيُّ، بِإِسْنَادِهِ وَمَعْنَاهُ قَالَ " فَلْيَسْجُدْ سَجْدَتَيْنِ قَبْلَ أَنْ يُسَلِّمَ ثُمَّ لْيُسَلِّمْ " .
This traditions has also been narrated by Muhammad b. Muslim al-Zuhr through a different chain of transmitters and to the same effect. This version adds; He should perform two prostrations before giving the salutation.
Reference : Sunan Abi Dawud 1032
In-book reference : Book 2, Hadith 643