What is the expiation for an oath, and is it permissible to pay it from the livelihood of the one expiating if he is employed, receives a salary, and is unmarried? And does one expiate for multiple oaths collectively or individually?

The expiation for an oath is feeding ten poor people from the average food one feeds their family, or clothing them, or freeing a slave. Whoever cannot find these, then fasting for three days, as stated in Surat Al-Ma'idah, Ayah 89. The expiation is to be paid from the oath-breaker's own money. If an oath is repeated and broken each time, then expiation is due for each oath, unless the sworn-upon matter is a single thing and the repetition of the oath was intended to confirm previous oaths, in which case only one expiation is due.