'Certainty' in the Bible

know and understand with certainty that the Lord your God will not continue to drive these nations out from before you; but they will be a snare and trap to you, and a whip on your sides and thorns in your eyes, until you perish from this good land which the Lord your God has given you.

For on the day you leave and cross over the Brook Kidron, know for certain that you shall surely die; your blood shall be on your own head.”

So the king sent word and called for Shimei and said to him, “Did I not make you swear by the Lord and solemnly warn you, saying, ‘Know for certain that on the day you leave [Jerusalem] and go anywhere, you shall surely die’? And you said to me, ‘The word (ruling) I have heard is good.’

To let you know the certainty of the words of truth,That you may give a correct answer to him who sent you?

But there will be no more gloom for her who was in anguish [for with judgment comes the promise of salvation]. In earlier times He treated the land of Zebulun and the land of Naphtali with contempt, but later on He will make them honored [by the presence of the Messiah], by the way of the sea, on the other side of Jordan, Galilee of the Gentiles.

The Lord has spoken to you, O remnant of Judah, “Do not go into Egypt!” Know with certainty that I [Jeremiah] have warned you and testified to you this day

Now therefore know for certain that you will die by the sword, by famine, and by virulent disease in the land [of Egypt] where you wish to reside [temporarily].

The king replied, “I know for certain that you are bargaining for time, because you have seen that my command [to you] is firm and irrevocable.