Agniveshyagrihyasutra 2.6.7.33

2.6.7.33

yadi śayanamicchennodakcchirā na vaṃśavaśo na dvārāya pādābhyāṃ na parvaṇe notsaveṣu na bhasi ca na grahāyatanabhūtāyatanāgnyāyataneṣu na nagno nāśuciḥ na sandhyayorna viśīrnakhaṭvāyāṃ na śmaśānāyatanamahāvṛkṣacchāyāsu nānyat pramādamastīti manyate \

If he wishes to sleep, he should think that there is no negligence [only when] not with head to the north, not subject to the crossbeam, not with feet toward the door, not on a parvan day, not during festivals, not on ashes, not in temples of the planets, temples of spirits, or fire sanctuaries, not naked, not impure, not at the two twilights, not on a broken bed, and not in the shadows of a cremation ground or large trees.