EXOD522 Observe the laws of the Hebrew servant. Having made us His Chosen People, Hashem wants us to purify our deeds and to crown ourselves with refined character traits. By doing so, we will merit His blessings. Of all the desirable character traits, kindness and mercy are particularly important. So that we cultivate these traits, Hashem commands us to behave with kindness and mercy towards those who are subservient to us.