And when Boaz had eaten and drunk, and his heart was merry, he went to lie down at the end of the heap of corn: and she came softly, and uncovered his feet, and laid her down. 3:7
Ruth does as Naomi says, and then at midnight Boaz wakes up and finds Ruth "at his feet." He asks who she is,
and she says, "I am Ruth thine handmaid: spread therefore your skirt over thine handmaid." 3:7-9