Sunan Abi Dawud 1032
سنن أبي داود#1032Sahihحَدَّثَنَا 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
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Al-AlbaniHasan Sahih
Muhammad Muhyi Al-Din Abdul HamidHasan Sahih
Shuaib Al ArnautHasan
Zubair Ali ZaiHasan
In-book reference: 2:643