if I say to a young woman, ‘Please lower your jug, that I may drink,’ and she answers, ‘Drink, and I will water your camels, too,’ then she is the one whom you have decided upon for your servant Isaac. In this way I will know that you have dealt graciously with my master.”
Isaiah replied, “This will be the sign for you from the Lord that he will carry out the word he has spoken: Shall the shadow go forward or back ten steps?”
God answered: I will be with you; and this will be your sign that I have sent you. When you have brought the people out of Egypt, you will serve God at this mountain.
and listen to what they are saying. After that you will have the courage to descend on the camp. So he went down with his aide Purah to the outposts of the armed men in the camp.