The Women - 4:43
Believers! Do not stand in prayer while intoxicated until you know what you say, and do not pray until you have washed after sexual intercourse, except for those who are travelers. And if you are sick or a pilgrim, or if one of you has come from the toilet, or if you have had sexual intercourse with women and have not found water, then do tayammum by touching a clean and dry earth and rubbing it on your face and hands. Allah Forgives, Forgives.
The most important criterion of belief:
The Cattle/6:82
Those who believe and do not mix their faith with wrongdoing, they deserve security and they have found the truth.
Luqman/31:13
"When Lokman advised his son, he said: "My dear son, do not associate partners with Allah; surely shirk (associating partners with God) is a great wrong."
The Companies/39:65
It has been revealed to you and those before you that if you associate partners, all that you do will be in vain and you will be of the losers.