'Certainly' in the Bible

Therefore thou shalt speak unto them this word: Thus saith Jehovah, the God of Israel, Every bottle shall be filled with wine: and they shall say unto thee, Do we not certainly know that every bottle shall be filled with wine?

And concerning Jehoiakim king of Judah thou shalt say, Thus saith Jehovah: Thou hast burned this roll, saying, Why hast thou written therein, saying, The king of Babylon shall certainly come and destroy this land, and shall cause to cease from thence man and beast?

Jehovah hath spoken concerning you, O remnant of Judah, Go ye not into Egypt: know certainly that I have testified unto you this day.

Now therefore know certainly that ye shall die by the sword, by the famine, and by the pestilence, in the place whither ye desire to go to sojourn there.

But we will certainly perform every word that is gone forth out of our mouth, to burn incense unto the queen of heaven, and to pour out drink-offerings unto her, as we have done, we and our fathers, our kings and our princes, in the cities of Judah, and in the streets of Jerusalem; for then had we plenty of victuals, and were well, and saw no evil.