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.
bayhaqi:2661Abū ʿAbdullāh > Abū Bakr > ʿAbdullāh > Hannād > ʿAbdah > ʿUbaydullāh b. ʿUmar > Nāfiʿ

[Machine] Abu Abdullah informed us that Abu Bakr reported to us that Abdullah narrated to us, who narrated from Hannad, who narrated from Abda, from Ubaidullah ibn Umar, from Nafi, that Ibn Umar, when he performed Sujood (prostration) with the turban on his head, he would raise it until he placed his forehead on the ground.  

البيهقي:٢٦٦١

أَخْبَرَنَا أَبُو عَبْدِ اللهِ أنبأ أَبُو بَكْرٍ أنبأ عَبْدُ اللهِ ثنا هَنَّادٌ ثنا عَبْدَةُ عَنْ عُبَيْدِ اللهِ بْنِ عُمَرَ عَنْ نَافِعٍ أَنَّ ابْنَ عُمَرَ كَانَ إِذَا سَجَدَ وَعَلَيْهِ الْعِمَامَةُ يَرْفَعُهَا حَتَّى يَضَعَ جَبْهَتَهُ بِالْأَرْضِ