Charles Ellicott Commentary Ruth 4:7

"Now this was [the custom] in former time in Israel concerning redeeming and concerning exchanging, to confirm all things: a man drew off his shoe, and gave it to his neighbor; and this was the [manner of] attestation in Israel." — Ruth 4:7 (ASV)

In former time. — Arguments have been built on this word in favour of our assigning a late date to the book, but the inference seems hardly warranted. The same Hebrew word occurs in Deuteronomy 2:10, Judges 1:10, etc.

Plucked off his shoe. — The idea of this act apparently is that the man resigns the right of walking on the land as master, in favour of him to whom he gives the shoe. A similar but not identical custom is prescribed in Deuteronomy 25:9.

A testimony. — The testimony, the manner in which the solemn witness is borne.