ذِكْرُ إِبَاحَةِ اسْتِعَانَةِ الْمُصَلِّي بِالرُّكْبَةِ فِي سُجُودِهِ عِنْدَ وُجُودِ ضِعْفٍ، أَوْ كِبَرِ سِنٍّ
The Companions of the Prophet ﷺ complained to the Prophet ﷺ about the hardship when they kept their forearms far away from their sides while prostrating. He said: Take help with the elbows (by spreading them on the ground and sticking them to the sides). (Using translation from Abū Dāʾūd 902)
شَكَى أَصْحَابُ رَسُولِ اللَّهِ ﷺ إِلَى النَّبِيِّ ﷺ مَشَقَّةَ السُّجُودِ عَلَيْهِمْ فَقَالَ «اسْتَعِينُوا بِالرُّكَبِ»