Valmiki Ramayana Ayodhya Kanda Sarga 101 Shloka 8
Original Shlokaप्रियेण किल दत्तं हि पितृलोकेषु राघव। अक्षय्यं भवतीत्याहुर्भवांश्चैव पितुः प्रियः।।2.101.8।।
1 source checked for this shloka
राघव O Rama, प्रियेण by a dear one, दत्तम् offered, पितृलोकेषु in the world of manes, अक्षय्यम् भवति becomes eternal, इति thus, आहुः खलु people say indeed, भवांश्चैव you alone, पितुः to father, प्रियः is beloved.
O son of Raghu's race, it is said that whatever is offered by a dear son becomes eternal in the world of manes. You alone are the beloved son of our father.