Albert Barnes Commentary Ruth 4:1

"Now Boaz went up to the gate, and sat him down there: and, behold, the near kinsman of whom Boaz spake came by; unto whom he said, Ho, such a one! turn aside, sit down here. And he turned aside, and sat down." — Ruth 4:1 (ASV)

The gate is the place of public gathering, of business, and of justice in Eastern cities (see Judges 19:15 note; Genesis 34:20; Deuteronomy 16:18).

Ho, such a one! – Indicating that the name of the kinsman was either unknown or purposely concealed (1 Samuel 21:2; 2 Kings 6:8).