I Samuel 17:21 Kabbalah

וַתַּעֲרֹ֤ךְ יִשְׂרָאֵל֙ וּפְלִשְׁתִּ֔ים מַעֲרָכָ֖ה לִקְרַ֥את מַעֲרָכָֽה׃

And Israel and the Philistines put the battle in array, army against army.

Read kabbalistic (mystical) interpretation of I Samuel 17:21: and classical mystical sources.