Yesaya 8:18

8:18 Look, I and the sons whom the Lord has given me ¹  are reminders and object lessons ²  in Israel, sent from the Lord who commands armies, who lives on Mount Zion.

Yesaya 20:2-4

20:2 At that time the Lord announced through ³  Isaiah son of Amoz: “Go, remove the sackcloth from your waist and take your sandals off your feet.” He did as instructed and walked around in undergarments ⁴  and barefoot. 20:3 Later the Lord explained, “In the same way that my servant Isaiah has walked around in undergarments and barefoot for the past three years, as an object lesson and omen pertaining to Egypt and Cush, 20:4 so the king of Assyria will lead away the captives of Egypt and the exiles of Cush, both young and old. They will be in undergarments and barefoot, with the buttocks exposed; the Egyptians will be publicly humiliated. ⁵ 

[8:18]  ¹ sn This refers to Shear-jashub (7:3) and Maher-Shalal-Hash-Baz (8:1, 3).

[8:18]  ² tn Or “signs and portents” (NAB, NRSV). The names of all three individuals has symbolic value. Isaiah’s name (which meant “the Lord delivers”) was a reminder that the Lord was the nation’s only source of protection; Shear-jashub’s name was meant, at least originally, to encourage Ahaz (see the note at 7:3), and Maher-Shalal-Hash-Baz’s name was a guarantee that God would defeat Israel and Syria (see the note at 8:4). The word מוֹפֶת (mofet, “portent”) can often refer to some miraculous event, but in 20:3 it is used, along with its synonym אוֹת (’ot, “sign”) of Isaiah’s walking around half-naked as an object lesson of what would soon happen to the Egyptians.

[20:2]  ³ tn Heb “spoke by the hand of.”

[20:2]  ⁴ tn The word used here (עָרוֹם, ’arom) sometimes means “naked,” but here it appears to mean simply “lightly dressed,” i.e., stripped to one’s undergarments. See HALOT 883 s.v. עָרוֹם. The term also occurs in vv. 3, 4.

[20:4]  ⁵ tn Heb “lightly dressed and barefoot, and bare with respect to the buttocks, the nakedness of Egypt.”