8:65

O Prophet, urge the believers to battle. If there are among you twenty [who are] steadfast, they will overcome two hundred. And if there are among you one hundred [who are] steadfast, they will overcome a thousand of those who have disbelieved because they are a people who do not understand.
Meaning:-
Steadfast: fixed in direction; steadily directed,firm in purpose, resolution, faith, attachment, etc., as a person