Abstract
The study of the concept of tazkiyatun nafs in the book of Sirrul Asrar by Sheikh Abdul Qodir Al-Jailani is very important to discuss so that people really understand how the concept of tazkiyatun nafs is actually in people's lives can apply it in an effort to give the heart from various mistakes made, so here the researcher tries to explain how the concept of tazkiyatun nafs according to Sufism scholars, getting closer to Allah as an effort to cleanse the soul and the concept of tazkiyatun nasf according to Sheikh Abdul Qodir Al-Jailani. The purpose of this research is for the readers to know the concept of tazkiyatun nasf according to Sheikh Abdul Qodir Al-Jailani. The method used in this research is based entirely on literature review or what is commonly referred to as literature study. What is meant by literature review is a review conducted to address a problem that basically relies on basic investigations and on data that has been collected. The result is that tazkiyatun nafs according to Shaykh Abdul Qodīr Al-Jailānī is a teaching that is oriented towards the formation of praiseworthy traits and self-cleansing from despicable traits. The higher a person's praiseworthy traits, the more it will increase the purity of his soul.

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