Valmiki Ramayana Ayodhya Kanda Sarga 58 Shloka 19
Original Shlokaअभिमानं च मानं च त्यक्त्वा वर्तस्व मातृषु। अनु राजानमार्यां च कैकेयीमम्ब कारय।।2.58.19।।
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अभिमानं च egoism, मानं च pride, मातृषु towards mothers, वर्तस्व conduct yourself, अम्ब O mother, आर्याम् venerable, कैकेयीम् Kaikeyi, राजानम् अनु welldisposed towards the king, कारय mould her.
'O mother, conduct yourself with other mothers without pride and egoism. Ensure that venerable Kaikeyi remains welldisposed towards the king.