BG Chap 18 - Tyāga in the mode of ignorance
Prescribed duties or nitya karmas should never be given up, even by the sannyāsī. Rejection arising from illusion or due to lack of knowledge of scriptures is in the mode of ignorance. One should give up kāmya karmas because they lead to bondage. But one should not give up nitya karmas such as the five daily sacrifices. The pañca-mahā-yajñas are: offerings to Brahman by chanting the Vedas, offerings to the devas by arcana, offerings to Pitṛs by tarpaṇa, offerings to guests by food, and offerings to animals by food. These should not be given up because they produce liberation thru the knowledge of ātmā which is inherent in them and because they enable one to continue to support the material body. A person worshipping the devas, who are vibhūtis of the Lord, can accomplish maintenance of his body for pursuing knowledge of the truth by taking the purified remnants. If a person gives up these duties out of ignorance (mohā), thinking they would cause bondage, such tyāga is in the mode of ignorance, because mohā is a characteristic of tamo guṇa. The result of such tāmasic tyāga is ignorance, instead of attainment of knowledge, which was the very goal in rejecting the nitya karma.