Valmiki Ramayana Bala Kanda Sarga 15 Shloka 30

तत: thereafter, पद्मपलाशाक्ष: lord having eyes resembling lotus petals, तदा then, आत्मानम् himself, चतुर्विधम् in four ways, कृत्वा having made, दशरथम् नृपम् king Dasaratha, तथा पितरम् as father, रोचयामास liked.

Thereafter, the Lord with eyes like the lotus petal was pleased to transform himself into four forms and to choose king Dasaratha as his father.