'Sure' in the Bible

But I will raise up for Myself a faithful priest who will do according to what is in My heart and in My soul; and I will build him a permanent and enduring house, and he will walk before My anointed forever.

If he says, ‘All right,’ your servant will be safe; but if he is very angry, then be certain that he has decided on evil.

Go now, be very persistent and investigate, and see where his haunt is and who has seen him there; for I am told he is very cunning.

Please forgive the transgression of your maidservant; for the Lord will certainly make my lord a secure and enduring house, because my lord is fighting the battles of the Lord, and evil will not be found in you all your days.