Use "dwell upon" in a sentence

1. But that is not the story they dwell upon.

2. Like their western counterparts, they often did dwell upon the dark side of life.

3. I want to dwell upon the draft immigration rules because most hon. Members have mentioned them.

4. Proverbs 25:24 says: “Better is it to dwell upon a corner of a roof than with a contentious wife, although in a house in common.”