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:1841Abū ʿAbdullāh al-Ḥāfiẓ And ʾAbū Saʿīd b. Abū ʿAmr > Abū al-ʿAbbās Muḥammad b. Yaʿqūb > Yaḥyá b. Abū Ṭālib > ʿAbd al-Wahhāb b. ʿAṭāʾ > ʿAbdullāh al-ʿUmarī > Nāfiʿ

[Machine] Ibn Umar might have called for prayer on his journey at dawn, then he would set up on the ground.  

البيهقي:١٨٤١أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ وَأَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو قَالَا ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثنا يَحْيَى بْنُ أَبِي طَالِبٍ ثنا عَبْدُ الْوَهَّابِ بْنُ عَطَاءٍ ثنا عَبْدُ اللهِ الْعُمَرِيُّ عَنْ نَافِعٍ قَالَ

كَانَ ابْنُ عُمَرَ رُبَّمَا أَذَّنَ عَلَى رَاحِلَتِهِ الصُّبْحَ ثُمَّ يُقِيمُ بِالْأَرْضِ