Sahih al-bukhari:7386 Chapter: The Prophet (saws) inviting his followers to Tauhid of Allah Book 97, Hadith 16

Narrated Abu Musa: We were with the Prophet (ﷺ) on a journey, and whenever we ascended a high place, we used to say,
“Allahu Akbar.” The Prophet (ﷺ) said, “Don’t trouble yourselves too much! You are not calling a deaf or
an absent person, but you are calling One Who Hears, Sees, and is very near.” Then he came to me
while I was saying in my heart, “La hawla wala quwwatta illa billah (There is neither might nor power
but with Allah).” He said, to me, “O `Abdullah bin Qais! Say, ‘La hawla wala quwwata illa billah
(There is neither might nor power but with Allah), for it is one of the treasures of Paradise.” Or said,
“Shall I tell you of it?”