Narrated Asma':

I went to 'Aisha and she was standing praying and the people, too, were standing (praying). So I said, "What is the matter with the people?" She beckoned with her head towards the sky. I said, "(Is there) a sign?" She nodded intending to say, "Yes."

حَدَّثَنَا يَحْيَى بْنُ سُلَيْمَانَ، قَالَ حَدَّثَنِي ابْنُ وَهْبٍ، حَدَّثَنَا الثَّوْرِيُّ، عَنْ هِشَامٍ، عَنْ فَاطِمَةَ، عَنْ أَسْمَاءَ، قَالَتْ دَخَلْتُ عَلَى عَائِشَةَ ـ رضى الله عنها ـ وَهِيَ تُصَلِّي قَائِمَةً وَالنَّاسُ قِيَامٌ فَقُلْتُ مَا شَأْنُ النَّاسِ فَأَشَارَتْ بِرَأْسِهَا إِلَى السَّمَاءِ. فَقُلْتُ آيَةٌ. فَقَالَتْ بِرَأْسِهَا أَىْ نَعَمْ.