Brihat Jataka
बुधसूर्यसुतौ नपुंसकाख्यौ शशिशुक्रौ युवती नराश्र्च शेषा: ॥ शिखिभूखपयोमरुद्गणानां वशिनो भूमिसुतादय: क्रमेण ॥ २-६ ॥
Venus and Jupiter both stand for the Brahmins, Sun and Mars represent the Kshatriyas ie the soldierly class, Moon represents the trading class. Mercury represents the Shudras and Saturn stands for the people outside the community. Moon, Sun and Jupiter have satvic nature (virtue), Mercury and Venus have rajasik nature (ambition) while Mars and 'Saturn represent tamas (inertia).
english translation
budhasUryasutau napuMsakAkhyau zazizukrau yuvatI narAzrca zeSA: ॥ zikhibhUkhapayomarudgaNAnAM vazino bhUmisutAdaya: krameNa ॥ 2-6 ॥
hk transliteration by Sanscript