When he lieth down, that thou shalt mark the place where he shall lie, and thou shalt go in, and uncover his feet, and lay thee down; and he will tell thee what thou shalt do. 3:4
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