HAKIM 5743:
from Sahl b. Ḥunayf —
[Machine] "That the Messenger of Allah ﷺ narrated to me, he said: 'The Messenger of Allah ﷺ said to me, "You are my messenger to Makkah. Convey to them my greetings of peace and say to them that the Messenger of Allah ﷺ orders you with three things: Do not swear by your fathers, and when you are alone, do not face the Qiblah (direction of prayer), and do not turn your back towards it, and do not perform Istinja (purification after relieving oneself) with a bone or dung."' Al-Dhahabi remained silent about it in summarizing."
الحاكم ٥٧٤٣:
عن سهل بن حنيف —
أَنَّ رَسُولَ اللَّهِ ﷺ حَدَّثَهُ قَالَ قَالَ لِي رَسُولُ اللَّهِ ﷺ أَنْتَ رَسُولِي إِلَى مَكَّةَ فَأَقْرِئْهُمْ مِنِّي السَّلَامَ وَقُلْ لَهُمْ إِنَّ رَسُولَ اللَّهِ ﷺ يَأْمُرُكُمْ بِثَلَاثٍ لَا تَحْلِفُوا بِآبَائِكُمْ وَإِذَا خَلَوْتُمْ فَلَا تَسْتَقْبِلُوا الْقِبْلَةَ وَلَا تَسْتَدْبِرُوهَا وَلَا تَسْتَنْجُوا بِعَظْمٍ وَلَا بِبَعْرٍ سكت عنه الذهبي في التلخيص
hadithunlocked.com