Sayyiduna Sa'd bin Junadah (may Allah be pleased with him) said: I was among the very first of the people of Ta'if to come to the Prophet (peace and blessings be upon him). I set out from my family in al-Surah early in the morning and reached Mina at the time of Asr. Then I climbed the mountain and came down, then I came to the Prophet (peace and blessings be upon him) and accepted Islam. He (peace and blessings be upon him) taught me "Qul huwa Allahu ahad" and "Idha zulzilat al-ardu zilzalaha", and he taught me these words: Subhan Allah (Glory be to Allah), wal-hamdu lillah (and praise be to Allah), wa la ilaha illa Allah (and there is no god but Allah), wa Allahu akbar (and Allah is the Greatest); and he said: "These are al-baqiyat al-salihat (the enduring good deeds)."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5464