'Sweat' in the Bible

“By the sweat of your faceYou will eat breadUntil you return to the ground,For from it you were taken;For you are dust,And to dust you shall return.”

They shall have linen turbans on their heads and linen undergarments on their loins; they shall not dress themselves with anything which makes them sweat.

And being in agony [deeply distressed and anguished; almost to the point of death], He prayed more intently; and His sweat became like drops of blood, falling down on the ground.