. Wells

For all the wells which his father's servants had digged in the days of Abraham his father,
the Philistines had stopped them,
and filled them with earth.
Genesis 26:15 KJV

And Isaac digged again the wells of water,
which they had digged in the days of Abraham his father;
for the Philistines had stopped them after the death of Abraham:
and he called their names after the names by which his father had called them.
Genesis 26:18 KJV