Sahih al-Bukhari — Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi) — Hadith No: 4268
Translation
Narrated Ash Shabi:An Nu`man bin Bashir said, "Abdullah bin Rawaha fell down unconscious.." (and mentioned the above Hadith adding, "Thereupon, when he died she (i.e. his sister) did not weep over him