Chapter on the Virtue of Mosques and Prayer Within Them, and the Virtue of Congregational Prayer and Its Rulings

From him, from Abu Ishaq al-Nahawandi, from al-Barqi, from Ibn Abi Umayr, from Abdullah ibn Sinan, who said: I heard Abu Abdillah عليه السلام, peace be upon him, say: “Whoever spits phlegm (tanakhkhaʿa) in the mosque and then swallows it back into his body, there will not remain any illness in his body except that it will be cured.”