مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 3800
Jihad
(Section III) - Section 1
وَعَنْ أَبِي سَعِيدٍ: أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بَعَثَ بَعْثًا إِلَى بَنِي لِحْيَانَ مِنْ هُذَيْلٍ فَقَالَ: «لينبعثْ مِنْ كلِّ رجلينِ أحدُهما والأجرُ بَينهمَا» . رَوَاهُ مُسلم
Abu Sa'id told that God’s Messenger sent an expedition to the B. Lihyan who were a section or Hudhail, saying that one out of every two men should be sent but that both should share the reward. Muslim transmitted it.
Mishkat al-Masabih, 3800صَحِيح (الألباني)