1 Samuel 3:2 (BSB)

And at that time Eli, whose eyesight had grown so dim that he could not see, was lying in his room.

From 1 Samuel 3. Also in the ESV.

Commentary on 1 Samuel 3:2

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on 1 Samuel 3:1-10: To make way for the account of God's revealing himself first to Samuel, we are here told, 1. How industrious Samuel was in serving God, according as his place and capacity were (Sa1 3:1): The child Samuel, though but a child, ministered unto the Lord before Eli. It was an aggravation of the wickedness of Eli's sons that the child Samuel shamed them.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on 1 Samuel 3:2: And it came to pass at that time,.... When the word of the Lord was scarce and precious, and there was no open vision; or, as Ben Gersom, the same day the man of God came to Eli at night, the following affair happened: when Eli was laid down in his place; on his bed to sleep, in one of the chambers or apartments of...
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on 1 Samuel 3:2: And it came to pass at that time, when Eli [was] laid down in his place, and his eyes began to wax dim, [that] he could not see; (c) In the court next to the tabernacle.
• Adam Clarke (Methodist), Clarke's Commentary on the Bible on 1 Samuel 3:2: Eli was laid down in his place - It is very likely that as the ark was a long time at Shiloh, they had built near to it certain apartments for the high priest and others more immediately employed about the tabernacle. In one of these, near to that of Eli, perhaps under the same roof, Samuel lay when he was called by the Lord.