Is an oath of conditional divorce swearing by something other than Allah?

Is it valid as expiation for breaking an oath (kaffarat yameen) to buy food for the poor from a restaurant?

She made a pledge to Allah that she would give up a habit, but she did not fulfil that pledge. What must she do?

What is meant by {from the average of that which you feed your [own] families} [al-Maa’idah 5:89]

He fasted as expiation for breaking an oath, but is not sure whether his fasting is valid, because he could afford to feed poor people

Should she sell some of her jewellery to offer expiation for breaking an oath or is it permissible for her to fast instead?

He vowed to fast on Mondays and Thursdays for the rest of his life; what should he do if that coincides with Ramadan, Eid or the Day of ‘Arafah?

Which of them takes precedence: doing ‘umrah or offering expiation for breaking an oath?

If he feeds one poor person on one day for ten expiations (kaffaarah), is that valid?

Is making a promise to oneself the same as making a vow or oath?