In my religion we are all children of God; He has no grandchildren. I can find language that "the Lord is my shepherd" but this is taken metaphorically as a way of communicating that He is our provider.
The Jews struggled for a long time to be freed of slavery. I don't recall any references where they considered their bond to God to be a master and slave relationship.
Islam lays claim to the heritage of Abraham through Ishmael, his illigetimate son through a slave girl. Still, the term is completely alien to the God of the Holy Scriptures, both the Old and New Testaments.
Shalom.
That's because this is a *fundamental tenet* of Islam - that God is the Master and man is God's slave. The idea of God as a loving Father who takes care of His children, and who have a *family* relationship with Him is not an Islamic one.