Then said David to the Philistine, Thou comest to me with a sword, and with a spear, and with a shield: but I come to thee in the name of the LORD of hosts, the God of the armies of Israel, whom thou hast defied. This day will the LORD deliver thee into mine hand; and I will smite thee, and take thine head from thee; and I will give the carcases of the host of the Philistines this day unto the fowls of the air, and to the wild beasts of the earth; that all the earth may know that there is a God in Israel. And all this assembly shall know that the LORD saveth not with sword and spear: for the battle is the LORD's, and he will give you into our hands. And it came to pass, when the Philistine arose, and came, and drew nigh to meet David, that David hastened, and ran toward the army to meet the Philistine. And David put his hand in his bag, and took thence a stone, and slang it, and smote the Philistine in his forehead, that the stone sunk into his forehead; and he fell upon his face to the earth. So David prevailed over the Philistine with a sling and with a stone, and smote the Philistine, and slew him; but there was no sword in the hand of David. (I Samuel 17: 45-50)The power of this holy name is contained in the words Jehovah-Tsaba, who is Lord of the army, or Lord of the Hosts, in verse 45. Goliath's height was suposed to stand six cubits and one span, about 9 feet, 6 inches. Great strength and fortitude is needed to succeed against such a giant. As folks are unlikely to meet a Nephilim warrior who is literally that physical height, this story should perhaps be studied for metaphorical advice for battling those giants who seem impenetrable because of their power and size.
Author Tony Evans in The Power of God's Names (2014) advised Christians on these most powerful names by explaining the following:
Friend, the names of God come with certain benefits and priileges. Use them. He had issued you the authority to use them in line with His will. He has powerful names, uniquely crafted for your situations. His ames can get you into ples you never coul have entered on your own. And they can give you the power to defeat the Goliaths in your life.David did not have a sword, but David did know God and the power of the Lord's name, and did have a weapon that Goliath did not expect--a stone in David's pouch.By advancing in God's name, David postioned himself to defeat someone who everyone thought was undefeatable. (p. 96)
A person who wishes to challenge someone whom everyone thought was undefeatable may choose to also recite this prayer, or another prayer like it:
Oh, mighty, Jehovah, Lord of Hosts, may it please thee that I vanquish my opponant as your servant, David, son of Jesse, slew Goliath of Gath, the champion who came out of the camp of the Philistines. I come to thee in the name of the Jehovah-Tsaba, the God of the armies of Israel as David didst in the days of Saul when he called upon thee. The Lord saveth not with sword and spear but by this mighty holy name! Arise Jehovah, Lord of Hosts! Overthrow and defeat my enemy that he may not have no power to injure me for the sack of your powerful, mighty name. Amen. Amen. Selah!