Isaac again dug the wells of warter which they had dug in the days of his father, Abraham, and which the Philistine had stopped up after Abraham’s death….

Isaac’s servants dug in the valley, and they found there a well of living waters. . . . He moved away from there, and he dug another well, and they did not quarrel over it; so he named it Rehoboth, and he said, “For now the L‑rd has made room for us, and we will be fruitful in the land.”(Genesis 26:18–22)

This abstract expressionistic painting, spread over three panels, portrays the complexity of the digging of the wells of our forefathers. The wells that Abraham had discovered and dug were covered by the Philistines(…)

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http://www.chabad.org/parshah/article_cdo/aid/3123525/jewish/Isaac-Re-Digs-His-Fathers-Wells.htm