In the year A. D. 1202, when Qulb-ud-Din captured Kalinjar, after the temples had been convened into mosques, and the very name of idolatry was annihilated, fifty thousand men came under the collar of slavery and the plain became black as pitch with Hindus. Qutb al-Din Aibak
Put your hand in your conscience and see if it does not come out as black as pitch. Dutch Proverb