(13) باب اسْتِحْبَابِ صَلاَةِ الضُّحَى وَأَنَّ أَقَلَّهَا رَكْعَتَانِ وَأَكْمَلَهَا ثَمَانِ رَكَعَاتٍ وَأَوْسَطَهَا أَرْبَعُ رَكَعَاتٍ أَوْ سِتٌّ وَالْحَثِّ عَلَى الْمُحَافَظَةِ عَلَيْهَا
A hadith like this has been reported by the same chain of transmitters, but with this alteration that the transmitter said:
" As Allah pleased."
Reference: Sahih Muslim 719 b
In-book reference: Book 6, Hadith 94
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1550