I, the LORD, am your God,
Who brought you up from the land of Egypt;
Open your mouth wide and I will fill it.
God jealously desires to satisfy my heart. No other gods, He commands, only Me. He is my Deliverer, the One who brought me up from Egypt. I am to enlarge my desire for Him (Matthew Henry's phrase). Open wide.
Will I take little or much of Christ?
He gives much, but will I receive it? He promises to fill my mouth. There is no limit, no measure of the goodness with which He offers to fill me.
But I would feed you with the finest of the wheat;
And with honey from the rock,
I would satisfy you.