Muhammad ibn ʿAbd al-Wahhāb and others, all of whom penned rebuttals against those sects, as well as against grave-worshipers and certain Sufi orders. As for the works devoted exclusively to refuting the innovators, they are many; among the classical titles, for example, are:

1. Al-Iʿtiṣām (Holding Fast) by Imām al-Shāṭibī.
2. Iqtidaʾ al-Ṣirāṭ al-Mustaqīm (Adhering to the Straight Path) by Shaykh al-Islam Ibn Taymiyyah, in which the response to the innovators occupies a large portion.
3. Inkār al-Ḥawādith waʾl-Bidaʿ (Denouncing Occurrences and Innovations) by Ibn Waḍḍāḥ.
4. Al-Ḥawādith waʾl-Bidaʿ (Occurrences and Innovations) by al-Ṭurṭūshī.
5. Al-Bāʿith ʿalā Inkār al-Bidaʿ waʾl-Ḥawādith (The Impetus to Denounce Innovations and Occurrences) by Abū Shāmah.

Among contemporary works are:

1. Al-Ibdaʿ fī Maḍār al-Ibtidāʿ (Innovation Unveiled: The Harms of Religious Innovation) by Shaykh ʿAlī Maḥfūẓ.
2. Al-Sunan waʾl-Mubtadaʿāt al-Mutaʿalliqa biʾl-Adhkār waʾl-Ṣalawāt (Sunnahs and Innovations Pertaining to Invocations and Prayers) by Shaykh Muḥammad ibn Aḥmad al-Shuqayrī al-Ḥawāmidī.
3. Risālat al-Taḥdhīr min al-Bidaʿ (A Treatise Warning Against Innovations) by Shaykh ʿAbd al-ʿAzīz ibn Bāz.