Sahih Muslim , Book 7, Hadith 3007 (USC-MSA) ⓘ
Nafi' reported that Ibn 'Umar regarded halt at Muhassab as Sunnah (of the Holy Prophet) and observed the noon prayer on Yaum al-Nafr at that place. Nafi' said: Allah's Messenger halted at Muhassab and the Caliphs did the same after him.
حَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمِ بْنِ مَيْمُونٍ، حَدَّثَنَا رَوْحُ بْنُ عُبَادَةَ، حَدَّثَنَا صَخْرُ بْنُ جُوَيْرِيَةَ، عَنْ نَافِعٍ، أَنَّ ابْنَ عُمَرَ، كَانَ يَرَى التَّحْصِيبَ سُنَّةً وَكَانَ يُصَلِّي الظُّهْرَ يَوْمَ النَّفْرِ بِالْحَصْبَةِ . قَالَ نَافِعٌ قَدْ حَصَّبَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَالْخُلَفَاءُ بَعْدَهُ .
also referenced under: Book 15, Hadith 372 (In-Book) & Hadith 1310 (Reference)