It is narrated from Humran bin Aban, may Allah have mercy on him, that he said: I saw Sayyiduna Uthman bin Affan, may Allah be pleased with him, that he called for water for ablution and performed ablution on a stone-paved ground. Then he said: I will tell you a hadith which I heard from the Messenger of Allah, peace and blessings be upon him. He said: I heard the Messenger of Allah, peace and blessings be upon him, saying: "Whoever performs ablution in the best manner and offers prayer, the sins committed between that prayer and the next prayer are forgiven."
Hadith Referenceصحيح ابن خزيمه / كتاب: الوضوء / 2
Hadith Takhrij«صحيح بخاري ، كتاب الوضوء ، باب المضمضة فى الوضوء ، حديث: 159 ، مسلم: كتاب الطهارة ، باب فضل الوضوء والصلاة 227 ، سنن نسائي ، حديث: 87 ، سنن ابي داود: 32 ، سنن ابن ماجه ، حديث: 332 ، احمد 57/1 ، من طريق يحيى بن سعيد رقم: 400 ، موطا مالك رقم: 58»