When Jesus says Yes noone can say No so don’t be swayed by words spoken by the enemy. God’s favour outweighs all opposition. No one can curse what God has blessed.
In the book of Numbers 23 verse 20 we see that no matter how much a person can wish you harm and want to curse you it won’t come to pass because the blessing of the Lord nullifys all those efforts. Stand firm in your faith and don’t loose your focus.