The meaning of this phrase (there is no power and no strength except with Allaah) is a person’s admission that he is unable to do anything without the help and support of Allaah. No matter how great his power, energy and strength may become, a person still cannot do anything without the help of Allaah Who is Above all of His creation
https://m.youtube.com/watch?v=-gR_QfI1KO8&t=10s