'Truly' in the Bible

Truly, not one of this evil generation will see that good land which I said I would give to your fathers,

So keep these laws and do them; for so will your wisdom and good sense be clear in the eyes of the peoples, who hearing all these laws will say, Truly, this great nation is a wise and far-seeing people.

And it will be that if you truly give ear to the orders which I put before you this day, loving the Lord your God and worshipping him with all your heart and all your soul,

Truly all the nations will say, Why has the Lord done so to this land? what is the reason for this great and burning wrath?

Truly, my face will be turned away from them in that day, because of all the evil they have done in going after other gods.