Abu Ishaq narrates that he heard a man from Banu Tamim saying: I asked Ibn Abbas (may Allah be pleased with them both) about a man pointing with his finger (i.e., in prayer), and he replied: This is bearing witness to the oneness of Allah. It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) commanded us to use the miswak with such emphasis that we feared a verse of the Qur'an might be revealed about it, and during prostration I saw the whiteness of the blessed armpits of the Prophet (peace and blessings be upon him).