'Truly' in the Bible

Truly in vain is [the help that is looked for] from the hills, the tumult on the mountains. Truly the salvation of Israel is in Yahweh our God.

Woe is me because of my hurt! my wound is grievous: but I said, Truly this is [my] grief, and I must bear it.

The prophet who prophesies of peace, when the word of the prophet shall happen, then shall the prophet be known, that Yahweh has truly sent him.