Yesaya 1:20

1:20 But if you refuse and rebel,

you will be devoured ¹  by the sword.”

Know for certain that the Lord has spoken. ² 

Yesaya 16:14

16:14 Now the Lord makes this announcement: “Within exactly three years ³  Moab’s splendor will disappear, along with all her many people; there will be just a few, insignificant survivors left.” ⁴ 

[1:20]  ¹ sn The wordplay in the Hebrew draws attention to the options. The people can obey, in which case they will “eat” v. 19 (תֹּאכֵלוּ [to’khelu], Qal active participle of אָכַל) God’s blessing, or they can disobey, in which case they will be devoured (Heb “eaten,” תְּאֻכְּלוּ, [tÿ’ukkÿlu], Qal passive/Pual of אָכַל) by God’s judgment.

[1:20]  ² tn Heb “for the mouth of the Lord has spoken.” The introductory כִּי (ki) may be asseverative (as reflected in the translation) or causal/explanatory, explaining why the option chosen by the people will become reality (it is guaranteed by the divine word).

[16:14]  ³ tn Heb “in three years, like the years of a hired worker.” The three years must be reckoned exactly, just as a hired worker would carefully keep track of the time he had agreed to work for an employer in exchange for a predetermined wage.

[16:14]  ⁴ tn Heb “and the splendor of Moab will be disgraced with all the great multitude, and a small little remnant will not be strong.”