Sunan at-Tirmidhi (Jami-al-Tirmidhi), Chapter: Salah (Prayers)

that some poor people came to Allah's Messenger (SAW) and said, "O Messenger of Allah! The rich pray as we do. They fast as we fast. And they have wealth with which they set slaves free and give charity.' He said, "When you have prayed, say subhan Allah thirty three times and al-Hamdulillah thirty-three times, and Allahu Akbar thirty-four times, and La ilaha illAllah ten times. You will attain the ranks of those who have overtaken you and no one will overtake you after that."