'Whatsoever' in the Bible

But Jehovah said unto me, Say not, I am a child; for thou shalt go to whomsoever I shall send thee, and whatsoever I command thee thou shalt speak.

And Jeremiah the prophet said unto them, I have heard; behold, I will pray unto Jehovah your God according to your words; and it shall come to pass that whatsoever thing Jehovah shall answer you, I will declare it unto you: I will keep nothing back from you.