And the Lord said unto Abraham
This discovers who the person was that had been conversing with
Abraham, that he was a divine Person, as appears by his name
"Jehovah", as well as by his knowledge of Sarah's behaviour; he
did not turn himself to her, that it might be more manifest that
it was not upon the sight of her he judged she laughed, but from
his own omniscience; and he chose rather to speak to her husband
than to her, appearing as a stranger, and that he might reprove
her: wherefore did Sarah laugh, saying, shall I of a surety
bear a child, which am old?
suggesting there was no reason for it, and signifying his
displeasure and indignation at it.