'Eternity' in the Bible

He has made everything appropriate in its time. He has also set eternity in their heart, yet so that man will not find out the work which God has done from the beginning even to the end.

“Even from eternity I am He,And there is none who can deliver out of My hand;I act and who can reverse it?”

Israel has been saved by the LordWith an everlasting salvation;You will not be put to shame or humiliatedTo all eternity.

“But as for you, Bethlehem Ephrathah,Too little to be among the clans of Judah,From you One will go forth for Me to be ruler in Israel.His goings forth are from long ago,From the days of eternity.”