Sunan Abi Dawud, Hadith 1969 ⓘ
Nafi' reported on the authority of Ibn Umar. He (ibn Umar) used to come (to Mina) and threw pebbles three days after the day of sacrifice walking when arriving and returning (both ways). He reported that the Prophet used to do so.
حَدَّثَنَا الْقَعْنَبِيُّ، حَدَّثَنَا عَبْدُ اللَّهِ، - يَعْنِي ابْنَ عُمَرَ - عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّهُ كَانَ يَأْتِي الْجِمَارَ فِي الأَيَّامِ الثَّلاَثَةِ بَعْدَ يَوْمِ النَّحْرِ مَاشِيًا ذَاهِبًا وَرَاجِعًا وَيُخْبِرُ أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ يَفْعَلُ ذَلِكَ .
also referenced under: Hadith 1964 (Hasan) & Book 10, Hadith 1964 (USC-MSA)