Ayodhyākānda - Canto 107

Śrī Rāma tries to impress upon Bharata, who believed that Daśaratha was prompted by lustful attachment to his mother in making over the kingdom to him, that Daśaratha was compelled to do so because, in the first place, he had promised to Kaikeyī’s father while marrying her that the latter's son alone would succeed to the throne after Daśaratha’s death, and secondly he was keen to repay the debt he owed to her for having come to his rescue in his encounter with the demons, and accordingly urges Bharata to assume the rulership of Ayodhyā.