What is the ruling on breaking an oath and expiating for it, concerning refraining from getting up for one's siblings from the computer? And is it permissible to get up for them after expiation? And is saying "yes" in response to the question "Do you swear on the Mushaf?" considered an oath without placing a hand or mentioning "and the Qur'an"? And are three expiations obligatory, or only one, for someone who swore to commit a sin three times and broke the oath each time?

If you broke your oath not to get up from the computer in front of your siblings, then you owe a single expiation (kaffarah), and the oath is dissolved. However, if you swore again after the first breaking of the oath, or if the wording of the oath implied repetition, or if you intended to repeat the breaking of the oath, then the expiation is repeated with each instance of breaking the oath.

If the oath was sworn before puberty, you do not owe an expiation, as the pen is lifted from a child until they reach puberty. Your saying "yes" to your father when he asked you, "Do you swear on the Qur'an?" is not an oath.

If you swore an oath not to commit a sin and then committed it, and then swore a second time and committed it, and then a third time and committed it, then you owe three expiations according to the majority of scholars.