It is narrated from Sayyiduna Abu Umamah al-Bahili (may Allah be pleased with him) that he heard the Messenger of Allah (peace and blessings be upon him) say: "Indeed, when the servant washes his palms, the sins of his hands fall away; and when he washes his face, rinses his mouth, cleans his teeth with the tooth-stick (miswak), draws water into his nose and blows it out, and wipes his head, the sins of his hearing, his sight and his tongue come out; and when he washes his arms and his feet, he becomes (as pure of sins) as he was on the day his mother gave birth to him. And whoever sleeps in a state of ablution upon the remembrance of Allah, whatever he asks Allah Almighty for of the affairs of his world and his Hereafter, until Allah returns his soul to him, Allah will surely grant it to him."
Hadith Referenceالمعجم الأوسط / باب العين / 4397
Hadith Takhrij«أخرجه النسائي فى «السنن الكبرى» برقم: 10575، والترمذي فى «جامعه» برقم: 3526، وأحمد فى «مسنده» برقم: 17295، 22601، 22636، 22706، 22712، وابن أبي شيبة فى «مصنفه» برقم: 39، 1274، والطبراني فى «الكبير» برقم: 7560، 7563، 7562، 7566، 7564، 7565، 7567، 7568، 8063، والطبراني فى «الأوسط» برقم: 1505، 4439»