John Gill Commentary 1 Samuel 3:16

"Then Eli called Samuel, and said, Samuel, my son. And he said, Here am I." — 1 Samuel 3:16 (ASV)

Then Eli called Samuel
Perceiving he was risen by the opening of the doors of the tabernacle, which he might hear; and observing he did not come to him as usual, to know whether he wanted anything, and being impatient to hear what was said to him of the Lord:

and he said, Samuel, my son ;
called him by his name, and in a very tender and affectionate manner, the more to engage him to hasten to him, and thereby also putting him in mind of his filial duty to obey him:

and he answered, here am I ;
ready to attend and perform any service enjoined him.