Musannaf Ibn Abi Shayba 18:1016

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Al-A’mash narrated to us, from Ibrahim, he said: Abdullah said: "A man remains in a state of latitude regarding his religion as long as his palm is clean of blood. But when he dips his hand into unlawful blood, his modesty is stripped away."