An unlearned Brahmana is an enemy (to all) and is the destroyer of the food that is offered to the gods and the departed manes. A gift made to such a person become useless. He is, therefore, like a robber. He can never attain to blissful regions hereafter.
देवतानां पितृणां च हव्यकव्यविनाशकः। शत्रुरर्थहरो मूर्यो न लोकान् प्राप्तुमर्हति॥