Differing grades
Sunan Abu Dawud 4971
I heard the Messenger of Allah (ﷺ) say: It is great treachery that you should tell your brother something and have him believe you when you are lying.
كَبُرَتْ خِيَانَةً أَنْ تُحَدِّثَ أَخَاكَ حَدِيثًا هُوَ لَكَ بِهِ مُصَدِّقٌ وَأَنْتَ لَهُ بِهِ كَاذِبٌ "