en_tn_condensed/gen/23/18.md

to Abraham by purchase

These words complete the idea that begins with the word "passed" in verse 17. "became Abraham's possession when he purchased it" or "belonged to Abraham after he bought it"

in the presence of the sons of Heth

"with the people of Heth watching as witnesses"

gate of his city

The city gate was where the leaders of the city would meet to make important decisions.