I saw Allah's Apostle ﷺ flinging pebbles while riding his camel on the Day of Nahr, and he was saying: Learn your rituals (by seeing me performing them), for I do not know whether I would be performing Hajj after this Hajj of mine.
أَنَّهُ سَمِعَ جَابِرًا يَقُولُ رَأَيْتُ النَّبِيَّ ﷺ يَرْمِي عَلَى رَاحِلَتِهِ يَوْمَ النَّحْرِ وَيَقُولُ لِتَأْخُذُوا مَنَاسِكَكُمْ فَإِنِّي لاَ أَدْرِي لَعَلِّي لاَ أَحُجُّ بَعْدَ حَجَّتِي هَذِهِ