What is the expiation for someone who swore to give 10 camels in charity if he returned to a sin, then committed it, and is unable to fulfill the vow?

If you swore an oath and then broke it, then swore another and broke it, you owe expiation for each oath you broke. However, if you swore multiple oaths to abandon a sin and then broke all of them, only one expiation is required. If you are unable to ascertain the number of oaths, you must investigate and offer expiation for what brings certainty or a strong presumption of clearing your responsibility. You are not required to give camels in charity when breaking your oath; rather, you owe only one expiation. You should also avoid excessive swearing.