It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that once the Prophet (peace and blessings be upon him) seated him behind himself on a mount, and when he sat upright on it, he said "Allahu Akbar" three times, "Alhamdulillah" three times, "Subhan Allah" three times, and "La ilaha illallah" once. Then he lay down on his back and began to laugh. Then, turning towards me, he said: "Whoever mounts his ride and does as I have done, Allah turns towards him and looks at him with a smile just as I have smiled at you."
Hadith Referenceمسند احمد / ومن مسند بني هاشم / 3057
Hadith Gradingحکم دارالسلام:إسناده ضعيف، أبوبكر بن عبدالله ضعيف، وعلي بن أبى طلحة لم يدرك ابن عباس