'Name of the Lord' in the Bible

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

And Jonathan said to David, Go in peace, since as we have sworn both of us in the name of the LORD, saying, The LORD be between me and you, and between my descendants and your descendants forever. And he arose and departed: and Jonathan went into the city.