"The Messenger of Allah permitted the camel herders who were in the camp (at Mina) to stone on the Day of An-Nahr then to gather the stoning of two days after the Day of An-Nahr, so that they stoned them during one of them." Malik said: "I think that he said about the first of them: 'They they should stone on the day of departure.'"  

رَخَّصَ رَسُولُ اللَّهِ ﷺ لِرِعَاءِ الإِبِلِ فِي الْبَيْتُوتَةِ أَنْ يَرْمُوا يَوْمَ النَّحْرِ ثُمَّ يَجْمَعُوا رَمْىَ يَوْمَيْنِ بَعْدَ يَوْمِ النَّحْرِ فَيَرْمُونَهُ فِي أَحَدِهِمَا قَالَ مَالِكٌ ظَنَنْتُ أَنَّهُ قَالَ فِي الأَوَّلِ مِنْهُمَا ثُمَّ يَرْمُونَ يَوْمَ النَّفْرِ  

“The Messenger of Allah ﷺ granted permission to some camel herders regarding staying (in Mina),* and allowing them to stone the Pillars on the Day of Sacrifice, then to combine the stoning of two days after the sacrifice, so that they could do it on one of the two days.”** Malik said: “I think that he said: ‘On the first of the first of the two days, then they could stone them on the day of departure (from Mina).’” (Using translation from Ibn Mājah 3037)  

أَرْخَصَ رَسُولُ اللهِ ﷺ لِرِعَاءِ الْإِبِلِ فِي الْبَيْتُوتَةِ أَنْ يَرْمُوا يَوْمَ النَّحْرِ ثُمَّ يَجْمَعُوا رَمْيَ يَوْمَيْنِ بَعْدَ النَّحْرِ فَيَرْمُونَهُ فِي أَحَدِهِمَا قَالَ مَالِكٌ ظَنَنْتُ أَنَّهُ فِي الْآخِرِ مِنْهُمَا ثُمَّ يَرْمُونَ يَوْمَ النَّفْرِ