It is narrated from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "One military expedition at sea is better than ten expeditions on land; whoever crosses the sea, it is as though he has crossed all the valleys; and the one who becomes dizzy at sea (because of the waves) has a reward equal to one who is rolling in his own blood in the path of Allah." This hadith is sahih (authentic) on the condition of Bukhari, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Uthman bin Affan (may Allah be pleased with him): I heard the Messenger of Allah (peace and blessings be upon him) say: "Guarding the frontier (ribat) for one day in the path of Allah is better than a thousand days (of worship) elsewhere."

Sayyiduna Uthman bin Affan (may Allah be pleased with him) was addressing the people at Mina: I am narrating to you a hadith that I have never narrated to you before. I heard the Messenger of Allah (peace and blessings be upon him) say: "Guarding the frontier for one day in the path of Allah is better than a thousand days elsewhere." (Then he asked:) Have I conveyed this message to you? The people said: Yes. So he said: O Allah, bear witness. This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.