"How knowest thou"

1. 2 Sam. 1: 5
     5 And David said unto the young man that told him, How knowest thou that Saul and Jonathan his son be dead?
2. 1 Cor. 7: 16
     16 For what knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife?
3. Alma 11: 30
     30 Now Zeezrom said unto him again: How knowest thou these things?
4. Alma 18: 20
     20 And the king said: How knowest thou the thoughts of my heart? Thou mayest speak boldly, and tell me concerning these things; and also tell me by what power ye slew and smote off the arms of my brethren that scattered my flocks—
5. Alma 21: 6
     6 Thou also sayest, except we repent we shall perish. How knowest thou the thought and intent of our hearts? How knowest thou that we have cause to repent? How knowest thou that we are not a righteous people? Behold, we have built sanctuaries, and we do assemble ourselves together to worship God. We do believe that God will save all men.