They found a sheep after its owner asked them about it and left

Q: My mother told me that 30 years ago my family was living in the desert, because they were traveling Bedouins. Once, they found a place in the desert where water was available, an old woman came asking about a lost sheep and its ram. This was at the beginning of the day and after five hours, the sheep and the young ram came. We searched for the woman but we did not find her. We did not know her name or place and we would not remain in that place. We left it after one and a half days. I should mention that we did not possess sheep, only camels. Therefore, my father, may Allah have mercy upon him, sent it to the market and sold it for fear of (Part No. 11; Page No. 238) hardships and that it might be eaten by wolves. He sold it for three French riyals, equal to 12 Arabian riyals. Dear respected shaykh, I hope that you will answer me as soon as possible in order to expiate on behalf of my father and show us what can be done. We are waiting for your response, may Allah guide you to what pleases Him.

A: If the case is as mentioned, you should give the price of the sheep and its ram in charity on behalf of its owner.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.