The nations also heard of him - The king of Egypt, whose subjects were of divers nations, marched against Jerusalem, took Jehoahaz prisoner, and brought him to Egypt. Thus: -

He was taken in their pit - Here is an allusion to those trap-pits digged in forests, into which the wild beasts fall, when the huntsmen, surrounding a given portion of the forest, drive the beasts in; by degrees narrowing the inclosure, till the animals come to the place where the pits are, which, being lightly covered over with branches and turf, are not perceived, and the beasts tread on them and fall in. Jehoahaz reigned only three months before he was dethroned by the king of Egypt, against whom it is apparent some craft was used, here signified by the pit, into which he fell.

he was Taken prisoner by Pharaoh-necho, and brought into Egypt

2 Kings 23:31,33,34 Jehoahaz was twenty and three years old when he began to reign; and he reigned three months in Jerusalem...

2 Chronicles 36:4,6 And the king of Egypt made Eliakim his brother king over Judah and Jerusalem, and turned his name to Jehoiakim...

Jeremiah 22:11,12,18 For thus said the LORD touching Shallum the son of Josiah king of Judah, which reigned instead of Josiah his father...