Valmiki Ramayana Ayodhya Kanda Sarga 75 Shloka 44

आर्यः esteemed one, यस्य whose, अनुमते with sanction, गतः exiled, तस्य for that man, उभे सन्ध्ये at the twilight hour of dawn and dusk, शयानस्य sleeping, यत् पापम् the extent of sin, परिकल्प्यते is fixed, तत् पापम् that sin, भवेत् shall be.

May the one who counselled the exile of my esteemed brother acquire the extent of demerit fixed for a person, who sleeps at the hour of twilight of dawn and dusk