Gn31-41a,
presenting Jacob's complaints against his employer, Laban, states
Thus have I been twenty years in your house;
I served you fourteen years for your two daughters,
and six years for your cattle;
and you have changed my wages ten times.
Rashi provides further details to the underlined words
you have changed my wages 10 times by cross referencing
an other verse
Gn31-07:09 which describes how Laban changed Jacob's
wages: Laban paid Jacob with sheep, not in cash. Hence when the
type of sheep that Jacob was paid started reproducing prolifically, Laban
would simply change the wage! Here are the actual verses:
And your father has deceived me, and changed my wages ten times; but God did not allow him to hurt me.
If he said thus, The speckled shall be your wages; then all the cattle bore speckled; and if he said thus, The striped shall be your hire; then all the cattle bore striped.
Thus God has taken away the cattle of your father, and given them to me.
Sermonic points: Here, our Patriarch Jacob
teaches us the how of faith with a bad employer.
One must have faith in God that any bad deals the Jew is forced
into God will undo. Furthermore God communicates to people in
dreams providing emotional support and necessary psychological
strengthening and guidance.