'Besides' in the Bible

This is why You are great, Lord God. There is no one like You, and there is no God besides You, as all we have heard confirms.

Besides, you only arrived yesterday; should I make you wander around with us today while I go wherever I can? Go back and take your brothers with you. May the Lord show you kindness and faithfulness.”

For who is God besides the Lord?And who is a rock? Only our God.