Bhagavatapurana 6.18.51

6.18.51

nādhautapādāprayatā nārdrapādā udakśirāḥ /
śayīta nāparāṅ nānyairna nagnā na ca sandhyayoḥ //

51. Without having washed the feet, without keeping herself clean or with wet feet, with the head placed towards the north or the west, with others, or, in nakedness, both in the morning (dawn) and evening (dusk), she should not go to sleep.