Once the Iqama was pronounced and the Prophet ﷺ was talking to a man (in a low voice) in a corner of the mosque and he did not lead the prayer till (some of) the people had slept (dozed in a sitting posture) .  

أُقِيمَتِ الصَّلاَةُ وَالنَّبِيُّ ﷺ يُنَاجِي رَجُلاً فِي جَانِبِ الْمَسْجِدِ فَمَا قَامَ إِلَى الصَّلاَةِ حَتَّى نَامَ الْقَوْمُ  

(The people) stood up for prayer and the Messenger of Allah ﷺ was whispering to a man, and in the narration of 'Abd al-Warith (the words are): The Apostle of Allah ﷺ was having a private conversation with a man, and did not start the prayer till the people dozed off.  

أُقِيمَتِ الصَّلاَةُ وَرَسُولُ اللَّهِ ﷺ نَجِيٌّ لِرَجُلٍ وَفِي حَدِيثِ عَبْدِ الْوَارِثِ وَنَبِيُّ اللَّهِ ﷺ يُنَاجِي الرَّجُلَ فَمَا قَامَ إِلَى الصَّلاَةِ حَتَّى نَامَ الْقَوْمُ  

"The Iqamah for prayer was said, and the Messenger of Allah ﷺ was conversing privately with a man, and did not commence the prayer until the people slept."  

أُقِيمَتِ الصَّلاَةُ وَرَسُولُ اللَّهِ ﷺ نَجِيٌّ لِرَجُلٍ فَمَا قَامَ إِلَى الصَّلاَةِ حَتَّى نَامَ الْقَوْمُ  

the Iqamah was pronounced (for the night prayer) and the Messenger of Allah ﷺ remained engaged in talking (to a person) in the corner of the mosque. He did not begin prayer until the people slept.  

أُقِيمَتِ الصَّلاَةُ وَرَسُولُ اللَّهِ ﷺ نَجِيٌّ فِي جَانِبِ الْمَسْجِدِ فَمَا قَامَ إِلَى الصَّلاَةِ حَتَّى نَامَ الْقَوْمُ  

"The Iqamah for prayer was said, and the Messenger of Allah ﷺ was conversing privately with a man, and did not commence the prayer until the people slept." (Using translation from Nasāʾī 791)  

أُقِيمَتِ الصَّلَاةُ وَرَسُولُ اللهِ ﷺ نَجِيٌّ لِرَجُلٍ فِي الْمَسْجِدِ فَمَا قَامَ إِلَى الصَّلَاةِ حَتَّى نَامَ الْقَوْمُ  

"عَنْ أَنَسٍ قَالَ: أُقيمت الصلاةُ ورسولُ الله ﷺ نَجِىٌّ لربه في جانبِ المسجدِ، فما قامَ إلى الصلاةِ حتى نامَ القومُ".