Valmiki Ramayana Bala Kanda Sarga 49 Shloka 21

महातपा: possessed of great ascetism, महातेजा: highly glorious, गौतमोऽपि Gautama also, अहल्यासहित: accompanied by Ahalya, सुखी full of joy, रामम् Rama, विधिवत् according to tradition, सम्पूज्य having worshipped, तप: austerities, तेपे performed.

Brilliant Gautam, the great ascetic, along with Ahalya, worshipped Rama according to tradition, with delight and continued with his austerities.