We used to speak while in prayer. One of us used to speak to his brother (while in prayer) about his need, till the Verse was revealed:-- "Guard strictly the (five obligatory) prayers, especially the middle (the Best) (ʿAsr) Prayer and stand before Allah with obedience (and not to speak to others during the prayers)." Then we were ordered not to speak in the prayers.  

كُنَّا نَتَكَلَّمُ فِي الصَّلاَةِ يُكَلِّمُ أَحَدُنَا أَخَاهُ فِي حَاجَتِهِ حَتَّى نَزَلَتْ هَذِهِ الآيَةُ {حَافِظُوا عَلَى الصَّلَوَاتِ وَالصَّلاَةِ الْوُسْطَى وَقُومُوا لِلَّهِ قَانِتِينَ} فَأُمِرْنَا بِالسُّكُوتِ  

Zaid b. Arqam said ; One of us used to speak to the man standing by his side during prayer. Then the Quranic verse “ And stand up with devotion to Allah”  

كَانَ أَحَدُنَا يُكَلِّمُ الرَّجُلَ إِلَى جَنْبِهِ فِي الصَّلاَةِ فَنَزَلَتْ { وَقُومُوا لِلَّهِ قَانِتِينَ } فَأُمِرْنَا بِالسُّكُوتِ وَنُهِينَا عَنِ الْكَلاَمِ  

"We used to talk behind Messenger of Allah (S) during the Salat, a man among us would talk to his companions next to him until (the following) was revealed: And stand before Allah with obedience. (2:238) So we were ordered to be silent and prohibited from talking."  

كُنَّا نَتَكَلَّمُ خَلْفَ رَسُولِ اللَّهِ ﷺ فِي الصَّلاَةِ يُكَلِّمُ الرَّجُلُ مِنَّا صَاحِبَهُ إِلَى جَنْبِهِ حَتَّى نَزَلَتْ (وَقُومُوا لِلَّهِ قَانِتِينَ ) فَأُمِرْنَا بِالسُّكُوتِ وَنُهِينَا عَنِ الْكَلاَمِ قَالَ وَفِي الْبَابِ عَنِ ابْنِ مَسْعُودٍ وَمُعَاوِيَةَ بْنِ الْحَكَمِ  

"We used to speak to each other during the prayer, saying whatever was necessary, at the time of the Messenger of Allah ﷺ, until this verse was revealed: Guard strictly (five obligatory) As-Salawat (the prayers) especially the middle Salah (i.e. the best prayer- 'Asr). And stand before Allah with obedience (and do not speak to others during the Salah (prayers)), so we were commanded to be silent." (Using translation from Nasāʾī 1219)   

«كُنَّا نَتَكَلَّمُ فِي الصَّلَاةِ بِالْحَاجَةِ حَتَّى نَزَلَتْ هَذِهِ الْآيَةُ {حَافِظُوا عَلَى الصَّلَوَاتِ وَالصَّلَاةِ الْوُسْطَى وَقُومُوا لِلَّهِ قَانِتِينَ} فَأُمِرْنَا بِالسُّكُوتِ»  

We used to speak while in prayer. One of us used to speak to his brother (while in prayer) about his need, till the Verse was revealed:-- "Guard strictly the (five obligatory) prayers, especially the middle (the Best) (ʿAsr) Prayer and stand before Allah with obedience (and not to speak to others during the prayers)." Then we were ordered not to speak in the prayers. (Using translation from Bukhārī 4534)  

كُنَّا نَتَكَلَّمُ فِي الصَّلَاةِ يُكَلِّمُ أَحَدُنَا أَخَاهُ فِي حَاجَتِهِ حَتَّى نَزَلَتِ الْآيَةُ {حَافِظُوا عَلَى الصَّلَوَاتِ وَالصَّلَاةِ الْوُسْطَى وَقُومُوا لِلَّهِ قَانِتِينَ} فَأُمِرْنَا بِالسُّكُوتِ  

[Machine] We used to talk during prayer in the time of the Messenger of Allah ﷺ. One of us would speak to his companion about a need between them until the verse was revealed: "Guard the prayers and the middle prayer and stand before Allah in devotion." Then we were commanded to be silent.  

كُنَّا عَلَى عَهْدِ رَسُولِ اللهِ ﷺ نَتَكَلَّمُ فِي الصَّلَاةِ يُكَلِّمُ أَحَدُنَا صَاحِبَهُ فِي الْحَاجَةِ فِيمَا بَيْنَهُ وَبَيْنَهُ حَتَّى نَزَلَتْ {حَافِظُوا عَلَى الصَّلَوَاتِ وَالصَّلَاةِ الْوُسْطَى وَقُومُوا لِلَّهِ قَانِتِينَ} فَأُمِرْنَا حِينَئِذٍ بِالسُّكُوتِ