Musnad Ahmad 1153:1324

'Abd al-Razzaq narrated to us, Ma'mar informed us, from Ibn Tawus, from his father, from 'Aisha, who said: When the Messenger of Allah (peace and blessings of Allah be upon him) saw a cloud formation (that looked like rain), his face would change, and he would enter and exit, and come and go. When it rained, he would be relieved of that. When that was mentioned to him, he said: "I am not secure that it might be as Allah said: 'Then when they saw it as a cloud approaching their valleys' [Al-Ahqaf: 24] until 'a wind in which is a painful punishment' [Al-Ahqaf: 24]."