John Trapp on Isaiah 7:3

Ver. 3. Then ſaid the Lord unto Iſaiah] Wicked Ahaz ſhall have a Prophet ſent him with a Promiſe, if it be but to leave him without excuſe: There was alſo a godly party in the Land, whoſe comfort was aimed at, and for whoſe ſake Shear jaſhub was alſo taken along, as carrying comfort in this very name: Portendit enim omnes pios qui divini verbi ſatu generandi ſunt ſalvos & incolumes fore, diviniſ que muneribus exornatos.

At the end of the Conduit of the upper pool] Where he is walking, and talking about ſending to Aſſyria for help. The place is pointed out for confirmation of the truth of the Propheſie. So in the Goſpel the Apoſtles are foretold where to fetch the Aſſe, where to prepare the Paſsover. This place was without the City, over againſt the Palace-Royal: the very ſame where afterwards Rabſhakah (the fugitive ſon of our Prophet Iſaiah, ſay the Rabbins; but without reaſon) railed upon the living God. This Propheſie here and now delivered,2 King. 18. might haply be ſome ſupport to good Hezekiah under that trial.

Of the Fullers field] Fullers muſt have ſtore of water, and room enough for the dreſſing and drying of their clothes, Miniſters are by an Ancient called Fullones animarum, Fullers of mens ſouls.