The Prophet (SAWA) said, ‘He who swindles a fellow Muslim brother, Allah snatches away the benediction in his sustenance, thwarts his efforts at earning a livelihood, and relegates him to his own base self.
Al-Kāfi #1177“The Imam has said, ‘Whoever uses foul language against his Muslim brother (in belief) Allah removes blessings from his livelihood, leaves...