(Imām Bukhārī narrates): Muhammad bin Bashshar narrated to us, he said: Abdul Wahhab narrated to us, he said: Ubaidullah narrated to us from Nafi' from Ibn Umar, may Allāh be pleased with them both, he relates that
on Eid al-Fitr and Eid al-Adha, a spear would be planted in front of the Prophet ﷺ, then he would pray.
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ قَالَ حَدَّثَنَا عَبْدُ الْوَهَّابِ قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنْ ابْنِ عُمَرَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ تُرْكَزُ الْحَرْبَةُ قُدَّامَهُ يَوْمَ الْفِطْرِ وَالنَّحْرِ ثُمَّ يُصَلِّي
Reference: Sahih Al Bukhari 972