Jami` at-Tirmidhi Book 48, Hadith 212
that his father offered him to the Prophet (ﷺ) to serve him. He said: “So the Prophet (ﷺ) passed by me, and I had just performed Salat, so he poked me with his foot and said: ‘Should I not direct you to a gate from the gates of Paradise?’ I said: ‘Of course.’ He (ﷺ) said: ‘There is no might or power except with Allah (Lā ḥawla wa lā quwwata illā billāh).’”
“I heard the Messenger of Allah (ﷺ) saying; ‘Indeed, Allah, the Mighty and Sublime, says: “Indeed My worshipper who is entirely My slave is the one who remembers Me when he is about to meet his enemy.” That is: “At the time of fighting.”
“No angel has risen from the earth until he said: ‘There is no might or power except with Allah (Lā ḥawla wa lā quwwata illā billāh).’”]