Did Samuel sleep in the holy of holies at Shiloh?
No. Leviticus 16:2
And the LORD said to Moses: "Tell your brother Aaron not to enter freely into the Most Holy Place behind the veil in front of the mercy seat on the ark, or else he will die, because I appear in the cloud above the mercy seat.
Where did Samuel sleep?
1 Samuel 3:
2 And at that time ...
Please see if this helps.
Some scholars think that Samuel was actually sleeping in the front compartment of the tent sanctuary called the Holy Place, the room where the Menorah, Table of Shewbread and the Incense Altar resided. This is very unlikely as this was still part of the Sanctury.
It is more likely that Samuel was sleeping in one of the many ...