It is narrated from Sayyiduna Mus'ab bin Sa'd (may Allah be pleased with him) that during the illness of Ibn 'Amir, some people came to him and began to praise him, but Sayyiduna 'Abdullah bin 'Umar (may Allah be pleased with them both) said: "I am not among those who deceive you. I heard the Messenger of Allah (peace and blessings be upon him) say: 'Indeed, Allah Almighty does not accept charity from treacherous wealth, nor prayer without ablution.'"