Muwatta Malik, Book 16, Hadith 553 (In-Book)

Yahya related to me from Malik from more than one reliable source that Sad ibn Abi Waqqas and Said ibn Zayd ibn Amr ibn Nufayl died at al-Aqiq and were carried to Madina and buried there.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ غَيْرِ، وَاحِدٍ، مِمَّنْ يَثِقُ بِهِ أَنَّ سَعْدَ بْنَ أَبِي وَقَّاصٍ وَسَعِيدَ بْنَ زَيْدِ بْنِ عَمْرِو بْنِ نُفَيْلٍ تُوُفِّيَا بِالْعَقِيقِ وَحُمِلاَ إِلَى الْمَدِينَةِ وَدُفِنَا بِهَا ‏.‏

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also referenced under: Book 16, Hadith 31 (USC-MSA)