The glory, i.e. the glorious type and assurance of God's presence, the ark, which is oft called God's glory, as Psalms 26:8, Psalms 78:61 Isaiah 64:11, and which was the great safeguard and ornament of Israel, which they could glory in above all other nations.
Related Commentaries of 1 Samuel 4:21
1 Samuel 4:21
21 And she named the child Ichabod,h saying, The glory is departed from Israel: because the ark of God was taken, and because of her father in law and her husband.