Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
abudawud:1032Ḥajjāj > Yaʿqūb from my father > Ibn Isḥāq > Muḥammad b. Muslim al-Zuhrī Biʾisnādih And Maʿnāh > Falyasjud Sajdatayn Qabl

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.  

أبو داود:١٠٣٢حَدَّثَنَا حَجَّاجٌ حَدَّثَنَا يَعْقُوبُ أَخْبَرَنَا أَبِي عَنِ ابْنِ إِسْحَاقَ حَدَّثَنِي مُحَمَّدُ بْنُ مُسْلِمٍ الزُّهْرِيُّ بِإِسْنَادِهِ وَمَعْنَاهُ قَالَ فَلْيَسْجُدْ سَجْدَتَيْنِ قَبْلَ

أَنْ يُسَلِّمَ ثُمَّ لْيُسَلِّمْ