Matthew Henry on 2 Chronicles 8:12–end
Here is, I. Solomon's devotion. The building of the temple was in order to the service of the temple. Whatever cost he was at in rearing the structure, if he had neglected the worship that was to be performed there, it would all have been to no purpose. Assisting the devotion of others will not atone for our own neglects. When Solomon had built the temple, 1. He kept up the holy sacrifices there, according to the law of Moses, Ch2 8:12, Ch2 8:13. In vain had the altar been built, and in vain had fire come down from heaven, if sacrifices had not been constantly brought as the food of the altar and the fuel of that fire. There were daily sacrifices, a certain rate every day, as duly as the day…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Chronicles 8:17
Then went Solomon to Ezion-geber, and to Eloth--These two maritime ports were situated at the eastern gulf of the Red Sea, now called the Gulf of Akaba. Eloth is seen in the modern Akaba, Ezion-geber in El Gudyan [ROBINSON]. Solomon, determined to cultivate the arts of peace, was sagacious enough to perceive that his kingdom could become great and glorious only by encouraging a spirit of commercial enterprise among his subjects; and, accordingly, with that in mind he made a contract with Huram for ships and seamen to instruct his people in navigation.
Adam Clarke on 2 Chronicles 8:17
Then went Solomon to Ezion-geber - See the notes on Kg1 9:26-28 (note), for conjectures concerning Ezion-geber and Ophir.
John Gill on 2 Chronicles 8:17
Then went Solomon to Eziongeber,.... Being now at leisure to look after his navy, to carry on merchandise; and of this, and the following verse, and the reconciliation of them with 1 Kings 9:26; see Gill on 1 Kings 9:26, 1 Kings 9:27, 1 Kings 9:28.
Keil & Delitzsch on 2 Chronicles 8:17–end
Voyage to Ophir. Cf. Kg1 9:26-28, and the commentary on that passage, where we have discussed the divergences of our narrative, and have also come to the conclusion that Ophir is not to be sought in India, but in Southern Arabia. By אז the date of this voyage is made to fall in the period after the building of the temple and the palace, i.e., in the second half of Solomon's reign.