عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا قَالَ كَشَفَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ عَنِ السِّتَارَةِ وَالنَّاسُ صُفُوفٌ خَلْفَ أَبِي بَكْرٍ رَضِيَ اللَّهُ عَنْهُ فَقَالَ أَيُّهَا النَّاسُ إِنَّهُ لَمْ يَبْقَ مِنْ مُبَشِّرَاتِ النُّبُوَّةِ إِلَّا الرُّؤْيَا الصَّالِحَةُ يَرَاهَا الْمُسْلِمُ أَوْ تُرَى لَهُ ثُمَّ قَالَ أَلَا إِنِّي نُهِيتُ أَنْ أَقْرَأَ رَاكِعًا أَوْ سَاجِدًا فَأَمَّا الرُّكُوعُ فَعَظِّمُوا فِيهِ الرَّبَّ وَأَمَّا السُّجُودُ فَاجْتَهِدُوا فِي الدُّعَاءِ فَقَمِنٌ أَنْ يُسْتَجَابَ لَكُمْ
Syedna Ibn Abbas (may Allah be pleased with them) narrates that the Noble Prophet (peace and blessings be upon him) lifted the curtain of his chamber and saw that people were standing in rows performing prayer behind Syedna Abu Bakr (may Allah be pleased with him). At that time, the Prophet (peace and blessings be upon him) said: O people! Of the glad tidings of Prophethood, only good dreams remain, which a Muslim sees or which are shown to someone for him. Beware! I have been forbidden from reciting the Qur'an in bowing (ruku) and prostration (sajdah). In ruku, glorify your Lord, and in sajdah, strive in making supplications, for it is most likely that your supplication will be accepted.