Genesis 30:42

42. The feebler were Laban’s This was a third trick . The Eastern sheep lamb twice a year, in spring and fall, and those born in the fall, according to Pliny, were the stronger. It is probable that after a time Laban suspected or discovered Jacob’s artifice, and accordingly changed his wages, or the terms of the contract, many times. See Genesis 31:7-8. But Jacob was smart enough to frustrate all his attempts to overreach him .