Exodus 5:20

5:20 When they went out from Pharaoh, they encountered Moses and Aaron standing there to meet them, 1 

Exodus 19:17

19:17 Moses brought the people out of the camp to meet God, and they took their place at the foot of the mountain.

1 sn Moses and Aaron would not have made the appeal to Pharaoh that these Hebrew foremen did, but they were concerned to see what might happen, and so they waited to meet the foremen when they came out.