Sayyiduna Abu Huraira (may Allah be pleased with him) said: Whoever says «سُبْحَانَ اللّٰهِ» thirty-three times after every prayer, and says «اَللّٰهُ أَكْبَر» thirty-three times, and says «اَلْحَمْدُ لِلّٰهِ» thirty-three times, and completes one hundred with «لَا إِلٰهَ إِلَّا اللّٰهُ، وَحْدَهُ لَا شَرِيكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ وَهُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ» , then his sins will be forgiven even if they are like the foam of the sea.