Musnad Ahmad 1153:1296

Ibn Numayr narrated to us, he said: Ubaydullah narrated to us, from Abd al-Rahman ibn al-Qasim, from his father, from Aisha, that she said: "I wish I had asked the Messenger of Allah, peace and blessings of Allah be upon him, for permission as Sawda asked him for permission, so that I could pray the morning prayer in Mina and throw the pebbles before the people arrive." It was said to her: "And did she ask him for permission?" She said: "Yes, for she was a heavy, slow woman, so she asked the Messenger of Allah, peace and blessings of Allah be upon him, for permission, and he gave her permission."