'Name of the Lord' in the Bible

Then David said to the Philistine, "You come to me with a sword, and with a spear, and with a javelin: but I come to you in the name of the LORD of hosts, the God of the armies of Israel, whom you have defied.

Jonathan said to David, "Go in peace, because we have both sworn in the name of the LORD, saying, 'The LORD shall be between me and you, and between my seed and your seed, forever.'" He arose and departed; and Jonathan went into the city.