Fire has originated water; the Kshatriya, from the Brahmana; and iron, from stone. The power of fire, the Kshatriya, and iron, are irresistible. But when these conflict with their sources, their force becomes neutralised.
अद्भ्योऽग्निर्ब्रह्मतः क्षत्रमश्मनो लोहमुत्थितम्। तेषां सर्वत्रगं तेः स्वासु योनिषु शाम्यति॥