The territory of Sin — a place name, not the term for moral malady — that Israel transversed after leaving Mitsraim (Egypt) was a very large place. It’s in the area where Mt. Sinai is located.
Yet, Yisra’el did sin at Rephadim, so it was called Massah and Meribah. But God still gave the people water from the rock — “living water” preceded law at Sinai — and defeated Amalek.
This is a difficult, laborious chapter. There are lots of hard-to-pronounce names — 40, 42 or 43 depending on the count. Yet the name of each encampment carries important teachings from what happened at each site and the meaning of the names themselves.
Saul is given another test by the LORD but Saul doesn’t know it was his final test. Saul’s acquiescence to peer pressure became his downfall and Samuel tells Saul that the kingdom will be given to another.