וַיִּקַּ֗ח שֵׁשׁ־מֵא֥וֹת רֶ֙כֶב֙ בָּח֔וּר וְכֹ֖ל רֶ֣כֶב מִצְרָ֑יִם וְשָׁלִשִׁ֖ם עַל־כֻּלּֽוֹ׃
And he took six hundred chosen chariots, and all the chariots of Egypt, and captains over all of them.
Read kabbalistic (mystical) interpretation of Exodus 14:7: and classical mystical sources.