'Perish' in the Bible

And David said, As Jehovah liveth, Jehovah will smite him; or his day shall come to die; or he shall go down into battle and perish.

And David said in his heart, I shall now perish one day by the hand of Saul: there is nothing better for me than that I should escape into the land of the Philistines; and Saul will despair of me, to seek me any more in all the borders of Israel: so shall I escape out of his hand.