He fought also with the king of the Ammonites. — “He also,” like his father, “fought with the king of the sons of Ammon.” They no doubt had refused the tribute imposed on them by Uzziah; but Jotham quelled their resistance, and they paid him a fixed contribution for three successive years.
The same year. — In that year; the year of the revolt.
Ten thousand measures. — Kôrîm. The kor was perhaps equivalent to our quarter. (Comp. 1 Kings 4:22; 2 Chronicles 2:10.)
The land of Ammon is fertile of grain even at the present day.
So much... and the third. — Rather, This (tribute) did the bnê Ammon restore to him (i.e., after withholding it during the year of rebellion); and in the second year, and the third. After three annual payments, the tribute was again suspended, perhaps because the Ammonites took advantage of the outbreak of the Syro-Ephraite war, which took place towards the end of the reign (2 Kings 15:37). There is no note of time in the text.