पूर्णे वर्षसहस्रे तु व्रतस्नातं महामुनिम्। अभ्यागच्छन् सुरास्सर्वे तप: फलचिकीर्षव:।।1.63.1।।
pūrṇe varṣasahasre tu vratasnātṃ mahāmunim| abhyāgacchan surāssarve tapa: phalacikīrṣava:||1.63.1||
Translation
वर्षसहस्रे when thousand years, पूर्णे had been completed, सर्वे all, सुरा: devatas, तप: फलचिकीर्षव: desiring to bestow the fruits of his austerities, व्रतस्नातम् who had taken the ritual bath after completion of the ritual, महामुनिम् mighty ascetic, अभ्यागच्छन् approached.
Meaning
All the gods wanted to bestow the fruits of austerties on the mighty ascetic (Viswamitra). They approached him after a thousand years of penace and his final ritual bath.