Ramayana
त्रयो लोका इवाव्यग्राः स्थितास्त्रय इवाग्नयः । त्रयो मन्त्रा इवात्युग्रास्त्रयो घोरा इवामयाः ॥ 7-5-7 ॥
They were like the three worlds standing unperturbed, like the three fires established, like the three exceedingly potent sacred formulas, and like the three dreadful diseases.
english translation