'Mightily' in the Bible

and the Spirit of the LORD came mightily upon him, and he tore the lion asunder as one tears a kid; and he had nothing in his hand. But he did not tell his father or his mother what he had done.

And the Spirit of the LORD came mightily upon him, and he went down to Ash'kelon and killed thirty men of the town, and took their spoil and gave the festal garments to those who had told the riddle. In hot anger he went back to his father's house.

When he came to Lehi, the Philistines came shouting to meet him; and the Spirit of the LORD came mightily upon him, and the ropes which were on his arms became as flax that has caught fire, and his bonds melted off his hands.