Valmiki Ramayana Sundara Kanda Sarga 53 Shloka 3

कपीनाम् for the monkeys, लाङ्गूलम् tail, इष्टम् is dear, भूषणम् is an ornament, भवति किल indeed is, अस्य his, तत् that, शीघ्रम् at once, दीप्यताम् may be set fire to, दग्धेन with the burning, तेन by that, गच्छतु let go.

"The tail is dear to the monkeys and it is an ornament for them. Set fire to it at once and let him go with his burning tail.