He became as a stone - Probably his violent anger at hearing it brought on a fit of apoplexy to which he was disposed by the drunken revel of the night before. After lying senseless for ten days he died.
Related Commentaries of 1 Samuel 25:37
1 Samuel 25:37
37 But it came to pass in the morning, when the wine was gone out of Nabal, and his wife had told him these things, that his heart died within him, and he became as a stone.