Al-Muhallab ibn AbuSufrah said: A man who heard the Prophet (ﷺ) say: If the enemy attacks you at night, let your war cry be Ha-Mim. They will not be helped.
Sunan Abi Dawud Book 15, Hadith 121
← Previous Hadith Ilyas bin Salamah(bin Al Akwa’) said on the authority of his father “We went on an expedition with Abu Bakr (Allaah be pleased with him) in the time of the Apostle of Allaah(ﷺ) and our war cry was “Put to death” “Put to death”.”

Sunan Abi Dawud Book 15, Hadith 120 Next Hadith → When the Messenger of Allah (ﷺ) proceeded on journey, he would say: O Allah, Thou art the Companion in the journey, and the One Who looks after the family; O Allah, I seek refuge in Thee from the difficulty of travelling, finding harm when I return, and unhappiness in what I see coming to my family and property. O Allah, make the length of his journey short for us, and the journey easy for us.

Sunan Abi Dawud Book 15, Hadith 122