'Themselves' in the Bible

“Those who were full hire themselves out for bread,But those who were hungry cease [to hunger].Even the barren [woman] gives birth to seven,But she who has many children withers away.

Now I have told him that I am about to judge his house forever for the sinful behavior which he knew [was happening], because his sons were bringing a curse on themselves [dishonoring and blaspheming God] and he did not rebuke them.

When both of them revealed themselves to the garrison of the Philistines, the Philistines said, “Look, the Hebrews are coming out of the holes where they have hidden themselves.”

When all the men of Israel who had hidden themselves in the hill country of Ephraim heard that the Philistines had fled, they too pursued them closely in the battle.

The priest answered David, “There is no ordinary (unconsecrated) bread on hand, but there is consecrated bread; [you may have it] if only the young men have kept themselves from women.”