Under his vine ... - This phrase seems to have been common among the Jews, and even among neighboring nations 2 Kings 18:31, to express a time of quiet and security. It is used by the prophets in descriptions of the Messianic kingdom (marginal references).
Related Commentaries of 1 Kings 4:25
1 Kings 4:25
25 And Judah and Israel dwelt safely,f every man under his vine and under his fig tree, from Dan even to Beersheba, all the days of Solomon.