It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that he said: "O Messenger of Allah, tell me about jihad and military expeditions." He (peace and blessings be upon him) said: "O Abdullah bin Amr, if you fight with patience and seeking reward, Allah will raise you as one who was patient and sought reward. And if you fight to show off and to boast (of numbers and strength), Allah will raise you as one who showed off and boasted. O Abdullah bin Amr, in whatever state you fight or are killed, Allah will raise you in that very state." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.