Jami` at-Tirmidhi Book 48, Hadith 163
“Al-`Abbas came to the Messenger of Allah (ﷺ) and it is as if he heard something, so the Prophet (ﷺ) stood upon the Minbar and said: ‘Who am I?’ They said: ‘You are the Messenger of Allah, upon you be peace.’ He said: ‘I am Muhammad bin `Abdullah bin `Abdul-Muttalib, indeed Allah created the creation, and He put me in the best group of them, then He made them into two groups, so He put me in the best group of them, the He made them into tribes, so He put me in the best of tribes, then He made them into houses, so He put me in the best of them in tribe and lineage.’”
“O Messenger of Allah, teach me a supplication that I may supplicate with in my Salat.” He (ﷺ) said: “Say: ‘O Allah, I have wronged myself much, and none forgives sins except You. So forgive me with forgiveness from You, and have mercy upon me, indeed, You are the Forgiving, the Merciful (Allāhumma innī ẓalamtu nafsī ẓulman kathīran wa lā yaghfirudh-dhunūba illā anta faghfirlī maghfiratan min `indika warḥamnī innaka antal-Ghafūrur-Raḥīm).’”
the Prophet (ﷺ) passed by a tree with dry leaves, so he struck it with his staff, making the leaves fall. Then he said: “Indeed, ‘all praise is due to Allah, (Al-Ḥamdulillāhh)’ ‘glory to Allah, (Subḥān Allāh)’ ‘none has the right to be worshipped by Allah, (Lā Ilāha Illallāh)’ and ‘Allah is the greatest (Allāhu Akbar)’ cause the sins to fall from the worshipper, just as the leaves of this tree fall.”