(Whoever intercedes for his brother with an intercession, and then receives a gift for it and accepts it, has indeed approached a great door of usury). Narrated by Abū Dāwūd (3541) through the chain of ʿUmar ibn Mālik from ʿUbayd Allāh ibn Abī Jaʿfar from Khālid ibn Abī ʿImrān from al-Qāsim from Abū Umāmah from the Prophet (ṣallá Allāhu ʿalayhi wa-sallam) who said: ... and he mentioned it. I say: This is a good isnād, all its men are trustworthy, the men of Muslim; except for al-Qāsim—who is Ibn ʿAbd al-Raḥmān Abū ʿAbd al-Raḥmān, the companion of Abū Umāmah—and he is considered reliable in ḥadīth as the opinion of the ḥadīth scholars has settled on, despite the well-known ancient disagreement about him. Therefore, Shaykh al-Islām Ibn Taymiyyah presented it as an accepted matter in some of his writings, see for example "Majmūʿ al-Fatāwá" (31/286). ʿUmar ibn Mālik was followed by Ibn Lahīʿah: narrated to us by ʿUbayd Allāh ibn Abī Jaʿfar with it. Narrated by Aḥmad (5/261). ʿUbayd Allāh ibn Zahr followed Ibn Abī Jaʿfar from ʿAlī ibn Yazīd from Qāsim with it. Narrated by al-Ṭabarānī in "al-Muʿjam al-Kabīr" (8/251/7853 and 283/7928), and from him by al-Shajarī in "al-Amālī" (2/236). This; and Abū Dāwūd titled the ḥadīth with: "Chapter on the gift for fulfilling a need." Accordingly, I say: This need is what the intercessor must fulfill for his brother, such as interceding for him with the judge to lift an injustice from him, or to deliver his right to him, and similar matters which Ibn Taymiyyah elaborated on in the aforementioned place; so whoever wishes may refer to it. It may occur to some minds that the ḥadīth contradicts the saying of the Prophet (ṣallá Allāhu ʿalayhi wa-sallam): "Whoever does a favor for you..