Valmiki Ramayana 6.76.43

तां शिलां तु प्रचिक्षेप राक्षसाय महाबलः।बिभेद तां शिलां कुम्भः प्रसन्नैः पञ्चभिः शरैः॥

tāṃ śilāṃ tu pracikṣepa rākṣasāya mahābalaḥ |bibheda tāṃ śilāṃ kumbhaḥ prasannaiḥ pañcabhiḥ śaraiḥ ||

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