Umm al-Mu'mineen Aisha Siddiqa (may Allah be pleased with her) says that whenever the Prophet Muhammad (peace and blessings be upon him) saw a patch of cloud in the sky, he would sometimes move forward, sometimes step back, sometimes go inside, sometimes come outside, and the color of his blessed face would change. Then, when it started to rain, that state of his (peace be upon him) would go away. Umm al-Mu'mineen Aisha Siddiqa (may Allah be pleased with her) asked the reason for this, so the Prophet Muhammad (peace and blessings be upon him) said: "How do I know? Perhaps this is not the cloud about which, when the people of 'Ad saw it approaching their valleys, they said, 'This is a cloud bringing us rain...' (Surah Al-Ahqaf: 24)"