| Clarke's Commentary on the Bible Tappuah - This was a city in the tribe of Manasseh, and gave name to a certain district called the land of Tappuah. See Joshua 17:8. The sea - The Mediterranean, as before.
Gill's Exposition of the Entire BibleThe border went out from Tappuah westward,.... Which was different from the Tappuah in the tribe of Judah, Joshua 15:34; this was in the tribe of Ephraim on the border of Manasseh, Joshua 17:8, unto the river Kanah; supposed by some to be the brook Cherith, by which Elijah hid himself, 1 Kings 17:3; though objected to by others; it seems to have had its name from the reeds which grew in it, or on the banks of it: and the goings out thereof were at the sea; if the river Kanah was the brook Cherith, this must be the dead or salt sea: but that is never called "the sea", rather the Mediterranean sea is meant, and consequently Kanah could not be Cherith, which was at too great a distance from this sea: this is the inheritance of the tribe of the children of Ephraim by their families; that is, this is the description of the border of it; for the cities within are not mentioned, and the descriptions in general are very obscure.
Keil and Delitzsch Biblical Commentary on the Old TestamentThe western half of the northern boundary went from Tappuah westwards to the Cane-brook, and terminated at the sea. Tappuah, called En-tappuah in Joshua 17:7, as the southern boundary of Manasseh, which is there described, and which ran from Michmethah to En-tappuah, coincides with the northern boundary of Ephraim, must not be identified with the royal town of that name mentioned in Joshua 12:17, and therefore was not Kefr Kud (Capercota), on the west of Jenin (Gina). This place was so far to the north, viz., seven hours to the north of Nabulus, that the boundary from Michmethah, in the neighbourhood of Shechem (Nabulus) onwards, would have run from south to north instead of in a westerly direction. Still less can En-tappuah be found, as Van de Velde supposes, in the old well of the deserted village of Atf, five hours to the east of Nabulus. It must have been to the west of Shechem; but it has not yet been discovered, as the country to the west of Nabulus and Sebastieh has "not been examined" (Van de Velde). The Cane-brook is no doubt the brook of that name mentioned by Bohad. (vita Salad. pp. 191, 193); only it is not quite clear "whether the Abu Zabura is intended, or a brook somewhat farther south, where there is still a Nahr el Kassab."
Geneva Study BibleThe border went out from Tappuah westward unto the river Kanah; and the goings out thereof were at the sea. This is the inheritance of the tribe of the children of Ephraim by their families.
Jamieson-Fausset-Brown Bible Commentary8. from Tappuah westward unto the river Kanah-It is retraced from east to west, to describe the prospective and intended boundary, which was to reach to the sea. Kanah ("reedy") flows into the Mediterranean.
Matthew Henry's Concise Commentary16:20-63 Here is a list of the cities of Judah. But we do not here find Bethlehem, afterwards the city of David, and ennobled by the birth of our Lord Jesus in it. That city, which, at the best, was but little among the thousands of Judah, Mic 5:2, except that it was thus honoured, was now so little as not to be accounted one of the cities. | 
