Sahih al-Bukhari 1209
Narrated Aisha:
I used to stretch my legs towards the Qibla of the Prophet (ﷺ) while he was praying; whenever he 
prostrated he touched me, and I would withdraw my legs, and whenever he stood up, I would restretch 
my legs.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، حَدَّثَنَا مَالِكٌ، عَنْ أَبِي النَّضْرِ، عَنْ أَبِي سَلَمَةَ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ كُنْتُ أَمُدُّ رِجْلِي فِي قِبْلَةِ النَّبِيِّ صلى الله عليه وسلم وَهُوَ يُصَلِّي، فَإِذَا سَجَدَ غَمَزَنِي فَرَفَعْتُهَا، فَإِذَا قَامَ مَدَدْتُهَا‏.‏