Sunan Ibn Majah, Book 26, Hadith 3251 (In-Book) ⓘ
it was narrated that Ibn ‘Abbas said: “We were with the Messenger of Allah on a journey, and the (day of) Al-Adha came. We (sacrificed) one camel on behalf of ten (people) and one cow on behalf of seven.”
حَدَّثَنَا هَدِيَّةُ بْنُ عَبْدِ الْوَهَّابِ، أَنْبَأَنَا الْفَضْلُ بْنُ مُوسَى، أَنْبَأَنَا الْحُسَيْنُ بْنُ وَاقِدٍ، عَنْ عِلْبَاءَ بْنِ أَحْمَرَ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ كُنَّا مَعَ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ فِي سَفَرٍ فَحَضَرَ الأَضْحَى فَاشْتَرَكْنَا فِي الْجَزُورِ عَنْ عَشَرَةٍ وَالَبَقَرَةِ عَنْ سَبْعَةٍ .
also referenced under: Hadith 3131 (Reference) & Volume 4, Book 26, Hadith 3131 (DarusSalam)