Ramayana
तौ परस्परशापेन देहावुत्सृज्य धार्मिकौ । अभूतां नृपविप्रर्षी वायुभूतौ तपोधनौ ॥ 7-56-4 ॥
Those two righteous ones, the king and the brahmin sage, having given up their bodies through their mutual curse, became beings of air, rich in ascetic power.
english translation