'Surely' in the Bible

Surely the Lord Yahweh will do nothing, unless he reveals his secret to his servants the prophets.

but don't seek Bethel, nor enter into Gilgal, and don't pass to Beersheba: for Gilgal shall surely go into captivity, and Bethel shall come to nothing.

For Amos says, 'Jeroboam will die by the sword, and Israel shall surely be led away captive out of his land.'"

Therefore thus says Yahweh: 'Your wife shall be a prostitute in the city, and your sons and your daughters shall fall by the sword, and your land shall be divided by line; and you yourself shall die in a land that is unclean, and Israel shall surely be led away captive out of his land.'"

Yahweh has sworn by the pride of Jacob, "Surely I will never forget any of their works.