An-Nisa 4:43 يا ايها الذين امنوا لا تقربوا الصلاة وانتم سكارى حتى تعلموا ما تقولون ولا جنبا الا عابري سبيل حتى تغتسلوا وان كنتم مرضى او على سفر او جاء احد منكم من الغايط او لامستم النساء فلم تجدوا ماء فتيمموا صعيدا طيبا فامسحوا بوجوهكم وايديكم ان الله كان عفوا غفورا ٤٣

O you who believe! Approach not As-Salât (the prayer) when you are in a drunken state until you know (the meaning) of what you utter, nor when you are in a state of Janâba ,(i.e. in a state of sexual impurity and have not yet taken a bath) except when travelling on the road (without enough water, or just passing through a mosque), till you wash your whole body. And if you are ill, or on a journey, or one of you comes after answering the call of nature, or you have been in contact with women (by sexual relations) and you find no water, perform Tayammum with clean earth and rub therewith your faces and hands (Tayammum)¹. Truly, Allâh is Ever Oft-Pardoning, Oft-Forgiving.