Srimad Bhagavatam

References to text SB 1.2.9
SB 1.2.9: All occupational engagements are certainly meant for ultimate liberation. They should never be performed for material gain. Furthermore, according to sages, one who is engaged in the ultimate occupational service should never use material gain to cultivate sense gratification.

Text â„–
One’s devotional service is spoiled when he becomes too entangled in the following six activities: (1) eating more than necessary or collecting more funds than required; (2) over-endeavoring for mundane things that are very difï¬cult to obtain; (3) talking unnecessarily about mundane subject matters; (4) practicing the scriptural rules and regulations only for the sake of following them and not for the sake of spiritual advancement, or rejecting the rules and regulations of the scriptures and working independently or whimsically; (5) associating with worldly-minded persons who are not interested in Kṛṣṇa consciousness; and (6) being greedy for mundane achievements.
Nectar of Instruction
NoI 2