‘ And her mother-in-law said to her, “Where have you gleaned today? And where have you wrought? Blessed be he who took notice of you.” And she showed her mother-in-law with whom she had wrought, and said, “The man's name with whom I wrought today is Boaz.”
Naomi seemingly gathered from the quantity of grain that Ruth had brought that someone had been especially kind towards her (‘blessed be he who took notice of you'), and asked her where she had been working, and in whose field she had been gleaning. And Ruth informed her that she had been working in the field of a man called Boaz.