Do you have to quote an entire verse perfectly...???

No, it is not your ability to quote an entire verse perfectly that releases God’s power, but faith in His Word and His love for you. And one word from Him is enough to send your enemies scurrying away.

Psalm 103:20
20Bless the Lord, you His angels, who excel in strength, who do His word, heeding the voice of His word.

Each time we speak God’s Word, we give voice to His Word. And when angels hear His Word given voice, they respond!