Hadith 1190

She said that when the Prophet prayed the two rak'as of the dawn prayer he lay down on his right side. (Bukhari and Muslim.)

وَعَنْهَا قَالَتْ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا صَلَّى رَكْعَتَيِ الْفَجْرِ اضْطَجَعَ عَلَى شقَّه الْأَيْمن "

Reference: 5611900

In-book reference: Book 4, Hadith 1190