Hadith 799

نَا الأَشَجُّ ، حَدَّثَنَا أَبُو خَالِدٍ ، عَنْ عُبَيْدِ اللَّهِ ، عَنْ نَافِعٍ ، عَنِ ابْنِ عُمَرَ ، أَنّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ " يُرْكَزُ لَهُ الْحَرْبَةُ ، يُصَلِّي إِلَيْهَا يَوْمَ الْعِيدِ "
It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that a spear would be fixed for the Prophet (peace and blessings of Allah be upon him), and he (peace be upon him) would use it as a sutrah and perform prayer on the day of Eid.
Hadith Reference صحيح ابن خزيمه / جماع أبواب سترة المصلي / 799