Ramayana
तपन्तं च तपस्तीव्रमम्भोमध्ये दुरासदम् । यशस्करं कामकरं कारुण्ये पर्यवस्थितम् ॥ 7-88-10 ॥
He was performing fierce austerities in the midst of the water, hard to approach, conferring renown, fulfilling desires, and established in compassion.
english translation