יְהֹוִ֣ה אֲ֭דֹנָי עֹ֣ז יְשׁוּעָתִ֑י סַכֹּ֥תָה לְ֝רֹאשִׁ֗י בְּי֣וֹם נָֽשֶׁק׃
O GOD the Lord, the strength of my salvation, Who hast screened my head in the day of battle,
Read kabbalistic (mystical) interpretation of Psalms 140:8: and classical mystical sources.