"We were in Mecca, and the prices of sacrificial animals increased. We bought for one dinar, then for two dinars, and then it reached seven dinars, and after that, we could not find any—neither for a little nor a lot. Hisham al-Mukari wrote to Abu al-Hasan (as) about this, and Imam (as) replied: 'Consider the first price, the second, and the third, add them together, and then give in charity an amount equivalent to one-third of it.'"