'Thousand' in the Bible

May the Lord, the God of your fathers, make you a thousand times greater in number than you are, and give you his blessing as he has said!

And I will have mercy through a thousand generations on those who have love for me and keep my laws.

Be certain, then, that the Lord your God is God; whose faith and mercy are unchanging, who keeps his word through a thousand generations to those who have love for him and keep his laws;

How would it be possible for one to overcome a thousand, and two to send ten thousand in flight, if their rock had not let them go, if the Lord had not given them up?