prāyōpavēśanaṅ yuktaṅ sarvēṣāṅ ca vanaukasām৷৷4.53.26৷৷
Translation
sugrīvēṇa by Sugriva, kṛtē fixed, tasmin kālē at this time, atītē when exceeded, sarvēṣām for all of us,vanaukasām for the forest dwellers (monkeys) svayam personally, prāyōpavēśanam fasting unto death, yuktam is right.
'Now that the time limit fixed by Sugriva has expired, the right thing to do for the monkeys is to fast unto death.