Shloka 6.127.9
भरद्वाजाश्रम-समागमः / Meeting Bharadvaja at the Hermitage (Homeward Blessings)
सर्वं च सुखदुःखंतेविदितंममराघव ।यत्त्वयाविपुलंप्राप्तंजनस्थान्नवधादिकम् ।।6.127.9।।
sarvaṃ ca sukhaduḥkhaṃ te viditaṃ mama rāghava | yat tvayā vipulaṃ prāptaṃ janasthānavadhādikam ||
O Raghava, all the happiness and sorrow you have undergone—so many events, beginning with the destruction at Janasthana and onward—are known to me.
"Raghava, while you were sojourning at Janasthana, you experienced joy and sorrow abundantly all that is known to me."
Sage Bharadwaja is speaking to Rama upon his stop at the sage's ashram while returning to Ayodhya.
Through his ascetic powers (Tapas), the sage claims to know all the joys and sorrows Rama experienced during his exile, specifically starting from the battle in Janasthana.