'Cannot' in the Bible

When he saw her, he ripped his clothes and said, "Oh no! My daughter! You have completely ruined me! You have brought me disaster! I made an oath to the Lord, and I cannot break it."

The Lord's messenger said to him, "You should not ask me my name, because you cannot comprehend it."

But if you cannot solve it, you will give me thirty linen robes and thirty sets of clothes." They said to him, "Let us hear your riddle."