Valmiki Ramayana Ayodhya Kanda Sarga 22 Shloka 6
Original Shlokaयस्या मदभिषेकार्थे मानसं परितप्यते। माता मे सा यथा न स्यात्सविशङ्का तथा कुरु।।2.22.6।।
1 source checked for this shloka
मदभिषेकार्थे in the matter of my consecration, यस्याः whose, मानसम् (heart), परितप्यते ached, सा मे माता that my mother (Kaikeyi), सविशङ्का with doubt, यथा how, न स्यात् will not entertain, तथा accordingly, कुरु act.
Act in such a way that our mother (Kaikeyi), whose heart ached due to my consecration should not entertain any doubt.