'Mightily' in the Bible

and the Spirit of Yahweh will come mightily on you, and you shall prophesy with them, and shall be turned into another man.

When they came there to the hill, behold, a band of prophets met him; and the Spirit of God came mightily on him, and he prophesied among them.

The Spirit of God came mightily on 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 brothers: and the Spirit of Yahweh came mightily on David from that day forward. So Samuel rose up, and went to Ramah.

It happened on the next day, that an evil spirit from God came mightily on Saul, and he prophesied in the midst of the house. David played with his hand, as he did day by day. Saul had his spear in his hand;

Then Saul said to David, "You are blessed, my son David. You shall both do mightily, and shall surely prevail." So David went his way, and Saul returned to his place.