Abu Salama bin 'Abdur Rahman أبو سلمة بن عبد الرحمن بن عوف · The Chapters on Expiation

'Whoever swears an oath and says In sha' Allah, he will have made an exception."(2)

"A man would give his family food that was abundant and another would give his family food that was barely sufficient, then the following was revealed: 'With the Awsat of that with which you feed your families...’”(2)