Sahih Bukhari, Chapter: Characteristics of Prayer

Once solar eclipse occurred during the lifetime of Allah's Apostle. He offered the eclipse prayer. His companions asked, "O Allah's Apostle! We saw you trying to take something while standing at your place and then we saw you retreating." The Prophet said, "I was shown Paradise and wanted to have a bunch of fruit from it. Had I taken it, you would have eaten from it as long as the world remains."