John Gill Commentary Ruth 1:18

"And when she saw that she was stedfastly minded to go with her, she left off speaking unto her." — Ruth 1:18 (ASV)

When she saw that she was steadfastly minded to go with her ,
&c.] That she was strong in her resolutions, and steadfast in her determinations not to go back to her own country, but to go forward with her; and nothing could move her from the firm purpose of her mind, which was what Naomi wanted to make trial of:

then she left speaking unto her :
that is, upon that head of returning home; otherwise, no doubt, upon this a close, comfortable, religious conversation ensued, which made their journey the more pleasant and agreeable.