Yes, you can sleep in Ihram.
According to information available, you can rest or sleep if necessary in Ihram, but you must not remove your ihram and put on normal clothes. This means it's permissible to sleep while observing the restrictions of Ihram.
In summary:
- Sleeping in Ihram is allowed.
- You must maintain the state of Ihram while sleeping, including adhering to all restrictions.
- Do not remove the Ihram clothing and change into regular clothes.
