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:325ʿAlī b. Sahl al-Ramlī > Ḥajjāj / al-Aʿwar > Shuʿbah Biʾisnādih Bihadhā al-Ḥadīth

He ('Ammar) said: He (the Prophet) then blew it and wiped with it his face and hands up to elbows or up to the forearms. Shu'bah said: Salamah used to narrate (the words) "the hands and the face and the forearms". One day Mansur said to him: Look, what are you saying, because no one except you mentions the (word) "forearms".  

أبو داود:٣٢٥حَدَّثَنَا عَلِيُّ بْنُ سَهْلٍ الرَّمْلِيُّ حَدَّثَنَا حَجَّاجٌ يَعْنِي الأَعْوَرَ حَدَّثَنِي شُعْبَةُ بِإِسْنَادِهِ بِهَذَا الْحَدِيثِ قَالَ

ثُمَّ نَفَخَ فِيهَا وَمَسَحَ بِهَا وَجْهَهُ وَكَفَّيْهِ إِلَى الْمِرْفَقَيْنِ أَوْ إِلَى الذِّرَاعَيْنِ قَالَ شُعْبَةُ كَانَ سَلَمَةُ يَقُولُ الْكَفَّيْنِ وَالْوَجْهَ وَالذِّرَاعَيْنِ فَقَالَ لَهُ مَنْصُورٌ ذَاتَ يَوْمٍ انْظُرْ مَا تَقُولُ فَإِنَّهُ لاَ يَذْكُرُ الذِّرَاعَيْنِ غَيْرُكَ