'Shield' in the Bible

Ye mountains of Gilboa, Let there be no dew nor rain upon you, neither fields of offerings: For there the shield of the mighty was vilely cast away, The shield of Saul, not anointed with oil.

God, my rock, in him will I take refuge; My shield, and the horn of my salvation, my high tower, and my refuge; My saviour, thou savest me from violence.

As for God, his way is perfect: The word of Jehovah is tried; He is a shield unto all them that take refuge in him.

Thou hast also given me the shield of thy salvation; And thy gentleness hath made me great.