It was narrated from Moosa bin Talhah, from his father, that The Prophet (ﷺ) said:

“Let one of you put something in front of him the height of the back of a saddle, then pray.`

حَدَّثَنَا عَبْدُ الرَّحْمَنِ، عَنْ زَائِدَةَ، عَنْ سِمَاكِ بْنِ حَرْبٍ، عَنْ مُوسَى بْنِ طَلْحَةَ، عَنْ أَبِيهِ، أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ يَجْعَلُ أَحَدُكُمْ بَيْنَ يَدَيْهِ مِثْلَ مُؤْخِرَةِ الرَّحْلِ ثُمَّ يُصَلِّي‏.‏