'Sleeping' in the Bible

So David set out and went to the place where Saul was camped. David saw the place where Saul and Abner son of Ner, the general in command of his army, were sleeping. Now Saul was lying in the entrenchment, and the army was camped all around him.

She got up in the middle of the night and took my son from my side, while your servant was sleeping. She put him in her arms, and put her dead son in my arms.

At noon Elijah mocked them, "Yell louder! After all, he is a god; he may be deep in thought, or perhaps he stepped out for a moment or has taken a trip. Perhaps he is sleeping and needs to be awakened."

When I tried to gain wisdom and to observe the activity on earth -- even though it prevents anyone from sleeping day or night --

Your shepherds are sleeping, O king of Assyria! Your officers are slumbering! Your people are scattered like sheep on the mountains and there is no one to regather them!