'Surely' in the Bible

Surely the Lord God does nothingWithout revealing His secret plan [of the judgment to come]To His servants the prophets.

“But do not resort to Bethel [to worship the golden calf]Nor enter [idolatrous] Gilgal,Nor cross over to Beersheba [and its idols];For Gilgal will certainly go into captivity and exile,And Bethel will come to nothing.

For in this way Amos has said, ‘Jeroboam will die by the sword and Israel will certainly go from its land into exile.’”

Therefore, thus says the Lord, ‘Your wife shall become a prostitute in the city [when the Assyrians capture Samaria] and your sons and your daughters shall fall by the sword, and your land shall be divided by a measuring line; you yourself shall die in an unclean and defiled [pagan] land, and Israel shall certainly go from its land into exile.’”

The Lord has sworn [an oath] by the pride of Jacob,“Surely I shall never forget [nor leave unpunished] any of their [rebellious] acts.