How long one should sit between the two prostrations
أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ أَبُو قُدَامَةَ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ شُعْبَةَ، قَالَ حَدَّثَنِي الْحَكَمُ، عَنِ ابْنِ أَبِي لَيْلَى، عَنِ الْبَرَاءِ، قَالَ كَانَ صَلاَةُ رَسُولِ اللَّهِ صلى الله عليه وسلم رُكُوعُهُ وَسُجُودُهُ وَقِيَامُهُ بَعْدَ مَا يَرْفَعُ رَأْسَهُ مِنَ الرُّكُوعِ وَبَيْنَ السَّجْدَتَيْنِ قَرِيبًا مِنَ السَّوَاءِ .
It was narrated that Al-Bara' said: "In the prayer of the Messenger of Allah (ﷺ), his bowing, his prostration, standing after he raised his head from bowing and (sitting) between the two prostrations, were almost the same."