His strength, to wit, the ark, called God’s strength, 1Ch_16:11, and the ark of his strength, Psa_132:8, because it was the sign and pledge of his strength or power put forth on his people’s behalf.
His glory; so the ark is called, as being the monument and seat of God’s glorious presence, and an instrument of his glorious works.
The enemy; namely, the Philistines; of which see 1Sa 4.