Consider the polite way in which Abraham and his son Isaac addressed each other at Genesis 22: 7. The good training from his parents was evident also in the case of Joseph.
لَاحِظْ ،‏ مَثَلًا ،‏ ٱلْأُسْلُوبَ ٱلْمُهَذَّبَ ٱلَّذِي تَخَاطَبَ بِهِ إِبْرَاهِيمُ وَإِسْحَاقُ فِي ٱلتَّكْوِينِ ٢٢ :‏ ٧‏ .‏