Lady Aisha (may Allah be pleased with her) narrates that she had taken two camels with her for sacrifice, but they got lost. Then, Sayyiduna Ibn Zubair (may Allah be pleased with him) gave her two camels, which she sacrificed. Later, the first two camels were also found, so Lady Aisha (may Allah be pleased with her) sacrificed them as well. Then she said that this is the prescribed way (Sunnah) for the sacrifice of (lost) camels.