Answer

Jain monks and nuns generally sleep indoors, but only in a place that is suitable according to Jain monastic discipline.

They do not sleep in a fixed personal home, luxurious room, or permanent residence. They stay temporarily in places such as:

• Upāśray
• Sthānak
• Dharmashālā
• Designated simple lodging offered by householders

Explanation

Jain monks and nuns live a life of non-possession, discipline, and detachment. Because of this:

• They do not own houses.
• They do not use beds or luxurious comforts.
• They sleep on the floor or on very simple permitted bedding, depending on the tradition.
• They usually stay only temporarily in one place, except during the rainy season retreat, called Chaturmās.

Sleeping outdoors is generally avoided because it may increase the risk of harming small living beings, insects, or other subtle forms of life. Indoor places are preferred when they are clean, simple, and appropriate for monk or nun conduct.

Spiritual Understanding

The purpose is not comfort, but carefulness — apramatta bhāv. Jain monks and nuns try to minimize harm, attachment, and bodily luxury while focusing on spiritual practice, study, meditation, and self-discipline.

Takeaway

Jain monks and nuns usually sleep indoors in simple, temporary, non-luxurious places, following the discipline of non-possession and non-violence.