«إن أعظم الذنوب عند الله رجل تزوج امرأة فلما قضى حاجته منها طلقها وذهب بمهرها ورجل استعمل رجلا فذهب بأجرته وآخر يقتل دابة عبثا»
The Prophet (peace and blessings be upon him) said:
"Indeed, among the gravest sins in the sight of Allah is that a man marries a woman, then when he has fulfilled his desire with her, he divorces her and usurps her dowry (mahr); and another is a man who employs a labourer and withholds his wages; and a third is the one who kills an animal without right (merely for sport)."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 1567