Genesis 26:23-25

Isaac returned to Beersheba where Abraham had lived occasionally. God appeared to him there (his second revelation) calming his fears and reviewing the promises that He had given previously (Genesis 26:2-5). Isaac’s response was to build an altar, worship Yahweh, and settle down there.

Settlers could only continue to live in an area where there was a well. Wells were vital to the life of nomadic herdsmen. While there was probably at least one well at Beersheba already, Isaac dug another for his own use, or perhaps because he needed more water. His ability to dig wells indicates both his wealth and his intention to establish permanent residence in the land.

These verses seem to confirm the fact that Isaac’s decision to move out of Philistine territory pleased God.