Dharma-kamah

Так называют брахманов: те чьим наслаждением является дхарма.
Далее несколько ссылок на писания, показывающие как представители других варн могут стать брахманами.

—Visvamitra, Ajamidha and Puramidha were admitted to the status of the Brahmin class, and even composed Vedic hymns.
—Janaka, a Kshatriyas by birth, attained the rank of a Brahmin by virtue of his ripe wisdom and saintly character.
—Narada said, 'If in members born in a certain Varna the qualities pertaining to another Varna are seen, they (the former) are to be classified as belonging to the latter Varna.'
Srimad Bhagavata Purana VII.11.35
—Sage Pulastya's views on how to become a Brahmana
Sage Pulastya said,"..by vows, by investiture of the sacred, by fasts, by rites, and by Mantras, one becometh a Brahmana."
Mahabharata, Aranya Parva LXXXIII
—At Kamyaka, Kusika’s son had quaffed the Soma juice with Indra. Then abandoning the Kshatriya order, he began to say,’‘I am a Brahmana’.
Mahabharata, Vana Parva, Section LXXXVII
—Peacefulness, self-control, austerity, purity, tolerance, honesty, wisdom, knowledge, and religiousness--these are the qualities by which the brahmanas work. Bhagavad Gita 18.42
—Rishi Yagyavalkya tells King Janaka
One who doesn't wish for Son, fame, money, life, has lost the desire of hunger, thirst is a Brahmin. One who knows the Brahman, is Brahmin.

О том кто такие брахманы также подробно рассказал Господь Будда Шакьямуни, заключительная глава Дхаммапады "о брахманах".