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 ﷺ used to do so.
أَنَّهُ كَانَ يَأْتِي الْجِمَارَ فِي الأَيَّامِ الثَّلاَثَةِ بَعْدَ يَوْمِ النَّحْرِ مَاشِيًا ذَاهِبًا وَرَاجِعًا وَيُخْبِرُ أَنَّ النَّبِيَّ ﷺ كَانَ يَفْعَلُ ذَلِكَ