John Gill Commentary Ruth 2:22

"And Naomi said unto Ruth her daughter-in-law, It is good, my daughter, that thou go out with his maidens, and that they meet thee not in any other field." — Ruth 2:22 (ASV)

And Naomi said to Ruth her daughter in law
Observing the charge Boaz had given her, she thought fit to advise her upon it:

it is good, my daughter, that you go out with his maidens ;
that is, go out in the morning with them, set out from Bethlehem when they went to work, and so continue with them all the day:

that they meet you not in any other field ;
the meaning is, either that men might not meet her in another field alone, or rush upon her at once and unawares, and reproach her, or beat her, or indeed force her; or else that the servants of Boaz might not meet her, or see her in another field, and report it to their master, who would be offended at her; and take it as a slight of his kindness to her; which latter seems rather to be the sense.