While seven in the Bible is certainly a remarkable number, we do not want to over do it by seeing significance in things where significance does not exist.
Good example of that is below,
“The booty remaining from the plunder, which the men of war had taken, was six hundred and seventy-five thousand sheep, seventy-two thousand cattle…” (Numbers 31.32, 33).
This simply recounts how much plunder the Israelites acquired from a battle, and we can see no significance to the number seven here.
Related Articles
- Sermon: In the Wilderness (grantspasschurchofchrist.com)
- Sermon: Drink of Christ, First Corinthians 10.1 – 13 (grantspasschurchofchrist.com)
- Numbers 31.19 – Purification after war for seven days (sevensinthebible.com)
- Numbers 31.24 – Warriors washed their clothes on the seventh day (sevensinthebible.com)
Sevens in the Bible 
I appreciate this reminder to be discerning about finding significance in numbers.