'Dawn' in the Bible

They got up early, and just before dawn, Samuel called to Saul on the roof, “Get up, and I’ll send you on your way!” Saul got up, and both he and Samuel went outside.

Saul said, "Let's go down after the Philistines tonight and plunder them until dawn, and let's not leave a single one of them alive." They said, "Do whatever seems good to you!" But the priest said, "Let's draw near to God here."

For as surely as the LORD God of Israel lives, the one who restrained me from harming you indeed, had you not quickly come to meet me, by dawn there wouldn't be a single male left to Nabal."

And Abigail went back to Nabal; and he was feasting in his house like a king; and Nabal's heart was full of joy, for he had taken much wine; so she said nothing to him till dawn came.