Mus'ab bin Sa'd (may Allah have mercy on him) says that at the time of Ibn 'Amir's (the governor of Basra) death, people began to praise him, so Sayyiduna 'Abdullah bin 'Umar (may Allah be pleased with them both) said: I do not want to make you dislike him, but I heard the Messenger of Allah (peace and blessings be upon him) say: Allah does not accept prayer without ablution, nor does He accept charity from unlawful wealth.