'Mightily' in the Bible

and the Spirit of Jehovah will come mightily upon thee, and thou shalt prophesy with them, and shalt be turned into another man.

And when they came thither to the hill, behold, a band of prophets met him; and the Spirit of God came mightily upon him, and he prophesied among them.

And the Spirit of God came mightily upon Saul when he heard those words, and his anger was kindled greatly.

Then Samuel took the horn of oil, and anointed him in the midst of his brethren: and the Spirit of Jehovah came mightily upon David from that day forward. So Samuel rose up, and went to Ramah.

And it came to pass on the morrow, that an evil spirit from God came mightily upon Saul, and he prophesied in the midst of the house: and David played with his hand, as he did day by day. And Saul had his spear in his hand;

Then Saul said to David, Blessed be thou, my son David: thou shalt both do mightily, and shalt surely prevail. So David went his way, and Saul returned to his place.