عن قيس بن عاصم قال: أتيت النبي صلى الله عليه وسلم أريد الإسلام، فأمرني أن أغتسل بماء وسدر.
[صحيح] - [رواه أبو داود والترمذي والنسائي]
المزيــد ...

Qays ibn ‘Āsim (may Allah be pleased with him) reported: I came to the Prophet (may Allah’s peace and blessings be upon him) with the intention of embracing Islam. He commanded me to take a bath with water and the leaves of lote-tree.
Sahih/Authentic. - [Abu Dawood]

Explanation

Qays ibn ‘Āsim (may Allah be pleased with him) reported that he came to the Prophet (may Allah’s peace and blessings be upon him) determining to embrace Islam. So, the Prophet (may Allah’s peace and blessings be upon him) instructed him to take a bath with water and lote-tree leaves, for better cleanliness and purification. This bath is prescribed upon entering Islam. A disbeliever who wants to embrace Islam should first take a bath, for it will clean his body from the impurities not avoided by disbelievers. This also applies to ritual impurity. The bath a disbeliever takes after entering Islam rids him of these effects.

Translation:
View Translations
1: It is prescribed for a disbeliever who wants to enter Islam to take a bath.
2: Islam cares about both the body and the spirit.
3: Mixing water with other pure materials does not affect its state of purification.
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