Verses 24 and 25 represent the first two verses of the next chapter of Isaiah, chapter 52. Thanks to Elias Higbee we have Joseph Smith’s explanation of the meaning of these two verses:
’Questions by Elias Higbee: What is meant by the command in Isaiah, 52d chapter, 1st verse, which saith: Put on thy strength, O Zion—and what people had Isaiah reference to?
He had reference to those whom God should call in the last days, who should hold the power of priesthood to bring again Zion, and the redemption of Israel; and to put on her strength is to put on the authority of the priesthood, which she, Zion, has a right to by lineage; also to return to that power which she had lost.
What are we to understand by Zion loosing herself from the bands of her neck; 2d verse?
We are to understand that the scattered remnants are exhorted to return to the Lord from whence they have fallen; which if they do, the promise of the Lord is that he will speak to them, or give them revelation. See the 6th, 7th, and 8th verses. The bands of her neck are the curses of God upon her, or the remnants of Israel in their scattered condition among the Gentiles.’ (DC 113:7-10)