Deuteronomy 7:17 KJV
If thou shalt say in thine heart, These nations are more than I; how can I dispossess them?
Deuteronomy 7:17, King James Version
In context
16 And thou shalt consume all the people which the Lord thy God shall deliver thee; thine eye shall have no pity upon them: neither shalt thou serve their gods; for that will be a snare unto thee.
17 If thou shalt say in thine heart, These nations are more than I; how can I dispossess them?
18 Thou shalt not be afraid of them: but shalt well remember what the Lord thy God did unto Pharaoh, and unto all Egypt;