Adam Clarke on Nehemiah 9:30

Many years didst thou forbear - It is supposed that Nehemiah refers here principally to the ten tribes. And many years did God bear with them; not less than two hundred and fifty-four years from their separation from the house of David, till their captivity and utter dispersion under Shalmaneser; during the whole of which time God invariably warned them by his prophets; or, as it is here said, by thy Spirit in thy prophets, which gives us the true notion of Divine inspiration. God's Spirit was given to the prophets; and they testified to the people, according as they were taught and influenced by this Spirit.