Servants: Slaves or Bond by Birth

And when Abram heard that his relative had been captured, he mobilized the 318 trained men born in his household, and they set out in pursuit as far as Dan.

Truly, O LORD, I am Your servant; I am Your servant, the son of Your maidservant; You have broken my bonds.

Is Israel a slave? Was he born into slavery? Why then has he become prey?