'Private' in the Bible

Saul then ordered his servants, “Speak to David in private and tell him, ‘Look, the king is pleased with you, and all his servants love you. Therefore, you should become the king’s son-in-law.’”

And Saul said, Then say to David, The king has no desire for any bride-price, but only for the private parts of a hundred Philistines so that the king may get the better of his haters. But it was in Saul's mind that David might come to his end by the hands of the Philistines.

So David and his men got up and went, and put to death two hundred of the Philistines; and David took their private parts and gave the full number of them to the king, so that he might be the king's son-in-law. And Saul gave him his daughter Michal for his wife.

And on the way he came to a place where sheep were kept, where there was a hollow in the rock; and Saul went in for a private purpose. Now David and his men were in the deepest part of the hollow.