Messenger of Allah (S) said: "As-Salat is two and two, with a Tashahhud for every two Rakʿah, with humility, imploring, having a sense of tranquility, pleading and showing helplessness and stretching out your hand" - he said: raising them - "to your Lord, with the insides of them facing your face, saying: 'O Lord! O Lord! And whoever does not do this, then it is like this or that." (Using translation from Tirmidhī 385)
عَنْ رَسُولِ اللهِ ﷺ قَالَ الصَّلَاةُ مَثْنَى مَثْنَى تَشَهَّدُ فِي كُلِّ رَكْعَتَيْنِ وَتَضَرَّعُ وَتَخَشَّعُ وَتَسَاكَنُ ثُمَّ تُقْنِعُ يَدَيْكَ يَقُولُ تَرْفَعُهُمَا إِلَى رَبِّكَ مُسْتَقْبِلًا بِبُطُونِهِمَا وَجْهَكَ وَتَقُولُ يَا رَبِّ يَا رَبِّ ثَلَاثًا فَمَنْ لَمْ يَفْعَلْ ذَلِكَ فَهِيَ خِدَاجٌ قَالَ أَبُو عَبْدِ الرَّحْمَنِ هَذَا هُوَ عِنْدِي الصَّوَابُ