Isaiah 7:3

“Then said the Lord unto Isaiah, &c.] The prophet, the inspired penman of these prophecies, that go by his name; what follows, the Lord said unto him in vision, or by an articulate voice, or by an impulse on his mind: go forth now to meet Ahaz; the prophet was in the city of Jerusalem, and Ahaz was without, as appears by the place after mentioned, where he was to meet him; perhaps Ahaz was at his country house, which, upon the news brought him of the designs of his enemies, he leaves, and betakes himself to Jerusalem, his metropolis, and fortified city, where he might be more safe; or he had been out to reconnoitre the passes about Jerusalem, and give orders and directions for the…”

“Go forth--out of the city, to the place where Ahaz was superintending the works for defense and the cutting off of the water supply from the enemy, and securing it to the city. So Isa 22:9; Ch2 32:4. Shearjashub--that is, A remnant shall return (Isa 6:13). His very name Isa 7:14; Isa 8:3 was a standing memorial to Ahaz and the Jews that the nation should not, notwithstanding the general calamity (Isa 7:17-25; Isa 8:6-8), be utterly destroyed (Isa 10:21-22). conduit--an aqueduct from the pool or reservoir for the supply of the city. At the foot of Zion was Fount Siloah (Isa 8:6; Neh 3:15; Joh 9:7), called also Gihon, on the west of Jerusalem (Ch2 32:30). Two pools were supplied from it, the…”

“Then said the Lord - In regard to the purposes for which Isaiah was sent to meet Ahaz, and the reason why this place was selected, see the Analysis of the chapter. Thou and Shear-ashub - The meaning of the name “Shear-jashub” is, ‘the remnant shall return.’ The names which Isaiah gave to his sons were significant or emblematic of some important events which were to occur to the Jews. They were for “signs” to the people, and had been given in order to keep before the nation the great truth that God was their protector, and that however much they might suffer or be punished, yet the nation would not be totally destroyed until the great Deliverer should come; see the note at Isaiah 7:14, and…”

“Thy son - Whose very name carried in it a sign and pledge of the promised deliverance, signifying, The remnant shall return. Fuller's field - Whither he probably went to take care about the waters which thence were brought into the city, to secure them to himself, or keep them from the enemy, as Hezekiah afterward did, Ch2 32:3-4. Isaiah 7:4”

“7:1–39:8 In this long section of the book, the nation of Israel was confronted with a vision of God, similar to how Isaiah was confronted in ch 6. 7:3 The aqueduct was a place where political negotiations took place later during Hezekiah’s reign (see 36:2).”

“Go forth: Exo 7:15; Jer 19:2, Jer 19:3, Jer 22:1 Shearjashub: that is, The remnant shall return, Isa 6:13, Isa 10:21, Isa 55:7; Rom 9:27 the end: Isa 36:2; Kg2 18:17, Kg2 20:20 highway: or, causeway Isaiah 7:4”

“In this season of terror Isaiah received the following divine instructions. "Then said Jehovah to Isaiah, Go forth now to meet Ahaz, thou and Shear-jashub thy son, to the end of the aqueduct of the upper pool, to the road of the fuller's field." The fuller's field (sedēh cōbēs) was situated, as we may assume with Robinson, Schultz, and Thenius, against Williams, Krafft, etc., on the western side of the city, where there is still an "upper pool" of great antiquity ( Ch2 32:30). Near to this pool the fullers, i.e., the cleaners and thickeners of woollen fabrics, carried on their occupation (Cōbēs, from Câbas, related to Câbash, subigere, which bears the same relation to râchatz as…”