Bhagavad Gita 7.23अन्तवत्तु फलं तेषां तद्भवत्यल्पमेधसाम्।देवान्देवयजो यान्ति मद्भक्ता यान्ति मामपि ॥

The exertion in the two kinds is the same and yet people do not attempt to worship the Supreme Being in order to attain the maximum benefits or the infinite reward (liberation or Moksha). The reward obtained by men of small understandng and petty intellect who worship the minor deities is small, perishable and temporary.Yajnas (Vedic rituals), Homas (rituals in which oblations are offered into the sacred fire) and Tapas (penance) of various sorts can bestow only temporary rewards on the performer. Liberation from the wheel of transmigration alone will give everlasting bliss and eternal peace.Those who worship Indra and others are Sattvic devotees those who worship Yakshas and Rakshasas (demoniacal beings) are Rajasic devotees and those who worship the Bhutas and Pretas (discarnate spirits) are Tamasic devotees.The knowledge of those who worship the small deities is partial and incomplete. It cannot lead to liberation. (Cf.IX.25)