Canto 2 -
Ayodhyā-kāṇḍa
Chapter 9: Kaikeyī Convinced by Mantharā
Text 2.9.9

कथय त्वं ममोपायं केनोपायेन मन्थरे।
भरतः प्राप्नुयाद्राज्यं न तु रामः कथञ्चन॥

kathaya tvaṁ mamopāyaṁ kenopāyena manthare
bharataḥ prāpnuyād rājyaṁ na tu rāmaḥ kathañcana

kathaya tvam = tell; mama upāyam = what I can do; kena = by what; upāyena = means; manthare = Mantharā; bharataḥ = Bharata; prāpnuyāt = can get; rājyam = the kingdom; na tu rāmaḥ kathañcana = and never Rāma.

Mantharā, tell me what I can do. By what means can Bharata and never Rāma get the kingdom?

Kathaya tvaṁ mamopāyam is elaborated in the rest of the verse.