"The Messenger of Allah ﷺ drew aside the curtain when he had a cloth wrapped around his head during his final illness, and said: 'O Allah, I have conveyed (the Message)' three times. 'There is nothing left of the features of Prophethood except a good dream that a person sees or is seen by others for him. But I have been forbidden to recite the Qur'an when bowing and prostrating, so when you bow, then glorify your Lord and when you prostrate, then strive hard in supplication, for it is more deserving of a response.'" (Using translation from Nasāʾī 1120)   

كَشَفَ رَسُولُ اللهِ ﷺ السِّتْرَ وَرَسُولُ اللهِ ﷺ مَعْصُوبٌ فِي مَرَضِهِ الَّذِي مَاتَ فِيهِ فَقَالَ اللهُمَّ هَلْ بَلَّغْتُ ثَلَاثَ مَرَّاتٍ إِنَّهُ لَمْ يَبْقَ مِنْ مُبَشِّرَاتِ النُّبُوَّةِ إِلَّا الرُّؤْيَا الصَّالِحَةُ يَرَاهَا الْعَبْدُ الصَّالِحُ أَوْ تُرَى لَهُ أَلَا فَإِنِّي قَدْ نُهِيتُ عَنِ الْقِرَاءَةِ فِي الرُّكُوعِ وَالسُّجُودِ فَإِذَا رَكَعْتُمْ فَعَظِّمُوا اللهَ وَإِذَا سَجَدْتُمْ فَاجْتَهِدُوا فِي الدُّعَاءِ فَإِنَّهُ قَمِنٌ أَنْ يُسْتَجَابَ لَكُمْ  

[Machine] That the Messenger of Allah ﷺ said: "The closest that a servant can be to his Lord is when he is prostrating, so increase your supplications in it."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ أَقْرَبُ مَا يَكُونُ الْعَبْدُ مِنْ رَبِّهِ وَهُوَ سَاجِدٌ فَأَكْثِرُوا الدُّعَاءَ فِيهِ  

The prophet ﷺ used to say when prostrating himself: “O Allah. Forgive me all my sins, small and great, first and last. “ the narrator Ibn al-sarh added: “open and secret.” (Using translation from Abū Dāʾūd 878)   

أَنَّ النَّبِيَّ ﷺ كَانَ يَقُولُ فِي سُجُودِهِ اللهُمَّ اغْفِرْ لِي ذَنْبِي كُلَّهُ دِقَّهُ وَجُلَّهُ وَأَوَّلَهُ وَآخِرَهُ زَادَ ابْنُ السَّرْحِ عَلَانِيَتَهُ وَسِرَّهُ