Sahih Bukhari Volume 8, Book 79, Hadith 6278

حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا جَرِيرٌ، عَنِ الأَعْمَشِ، عَنْ أَبِي الضُّحَى، عَنْ مَسْرُوقٍ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصَلِّي وَسْطَ السَّرِيرِ، وَأَنَا مُضْطَجِعَةٌ بَيْنَهُ وَبَيْنَ الْقِبْلَةِ تَكُونُ لِيَ الْحَاجَةُ، فَأَكْرَهُ أَنْ أَقُومَ فَأَسْتَقْبِلَهُ فَأَنْسَلُّ انْسِلاَلاً‏

Narrated By 'Aisha : Allah's Apostle used to offer his prayer (while standing) in the midst of the bed, and I used to lie in front of him between him and the Qibla It I had any necessity for getting up and I used to dislike to get up and face him (while he was in prayer), but I would gradually slip away from the bed.