'Surely' in the Bible

There was no end of all the people, even of all them over whom he was -- yet those who come after shall not rejoice in him. Surely this also is vanity and a chasing after wind.

Surely extortion makes the wise man foolish; and a bribe destroys the understanding.

Surely there is not a righteous man on earth, who does good and doesn't sin.

Though a sinner commits crimes a hundred times, and lives long, yet surely I know that it will be better with those who fear God, who are reverent before him.