'Emptiness' in the Bible

Truly I've been allotted months of emptiness; nights of trouble have been appointed for me.

Let him not trust in a worthless speech. He leads only himself astray, for emptiness will be his reward.

"But hawks and hedgehogs will possess it; owls and ravens will nest in it. God will stretch out over it a measuring line, and chaos, and plumb lines of emptiness, and its nobles.

"I said: "I've labored for nothing. I've exhausted my strength on futility and on emptiness.' Yet surely my recompense is with the LORD, and my reward is with my God.

Instead, poured out in emptiness, a servant's form did he possess, a mortal man becoming. In human form he chose to be,