אִלֵּין֙ חֵיוָתָ֣א רַבְרְבָתָ֔א דִּ֥י אִנִּ֖ין אַרְבַּ֑ע אַרְבְּעָ֥ה מַלְכִ֖ין יְקוּמ֥וּן מִן־אַרְעָֽא׃
’These great beasts, which are four, are four kings, that shall arise out of the earth.
Read kabbalistic (mystical) interpretation of Daniel 7:17: and classical mystical sources.