John Gill Commentary 1 Kings 3:19

"And this woman`s child died in the night, because she lay upon it." — 1 Kings 3:19 (ASV)

And this woman's child died in the night
Whether the same night following the day it was born is not certain; because she overlaid it ;
or laid upon it, being heavy through sleep, and not knowing what she did, turned herself upon it, and smothered it; because it had no previous illness, or any marks of any disease it could be thought to die of, and perhaps there might be some of its being overlaid.