Genesis 19:20 Meaning

18And Lot said unto them, Oh, not so, my Lord:

19Behold now, thy servant hath found grace in thy sight, and thou hast magnified thy mercy, which thou hast shewed unto me in saving my life; and I cannot escape to the mountain, lest some evil take me, and I die:

20Behold now, this city is near to flee unto, and it is a little one: Oh, let me escape thither, (is it not a little one?) and my soul shall live.

21And he said unto him, See, I have accepted thee concerning this thing also, that I will not overthrow this city, for the which thou hast spoken.

22Haste thee, escape thither; for I cannot do any thing till thou be come thither. Therefore the name of the city was called Zoar.