Genesis 32:8

“And said, If Esau come to the one company, and smite it, then the other company which is left shall escape.”

KJV

Meaning

Jacob's division of the company is a contingency plan aimed at limiting loss if his worst fear becomes reality.

This is prudential planning in a specific crisis, not a general biblical rule that strategic preparation either proves faith or proves unbelief.

The verse shows a person acting under uncertainty while still carrying responsibility for the safety of others.