Valmiki Ramayana 5.65.22

एष चूडामणिः श्रीमान् मया सुपरिरक्षितः ।मनःशिलायास्तिलको गण्डपार्श्वे निवेशितः॥

eṣa cūḍāmaṇiḥ śrīmān mayā suparirakṣitaḥ |manaḥśilāyāstilako gaṇḍapārśve niveśitaḥ ||

Our plain-language meaning of this verse is waiting for scholar review.