A person in Salat (prayer) is speaking in private to his Lord (Allah) Sahih al-Bukhari 532
Arabic hadith text
حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، قَالَ حَدَّثَنَا يَزِيدُ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا قَتَادَةُ، عَنْ أَنَسٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ "اعْتَدِلُوا فِي السُّجُودِ، وَلاَ يَبْسُطْ ذِرَاعَيْهِ كَالْكَلْبِ، وَإِذَا بَزَقَ فَلاَ يَبْزُقَنَّ بَيْنَ يَدَيْهِ وَلاَ عَنْ يَمِينِهِ، فَإِنَّهُ يُنَاجِي رَبَّهُ "
Translation
Narrated Anas
The Prophet (ﷺ) said, "Do the prostration properly and do not put your forearms flat with elbows touching the ground like a dog. And if you want to spit, do not spit in front, nor to the right for the person in prayer is speaking in private to his Lord."