Something like the hadith of Malik is narrated from Sayyiduna Mu'awiyah bin al-Hakam (may Allah be pleased with him): that the prayer of the Prophet (peace and blessings be upon him) was eleven rak'ahs, and he (peace and blessings be upon him) would lie down on his right side.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16985