According to the early rabbinical commentary Pirke De - Rabbi Eliezer , Zilpah and Bilhah , the handmaids of Leah and Rachel , respectively , were actually younger daughters of Laban .
Head entity: laban Q840401 30
Tail entity: leah Q128847 19
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40