Ziyad informed me that Salih, the freed slave of al-Tawamah, told him that he heard Ibn Abbas narrating from the Prophet ﷺ, "Kinship is a branch attached to the waist-wrap of the Most Merciful. He maintains ties with whoever maintains it, and severs ties with whoever severs it."
حدثنا روح حدثنا
أخبرني زياد أن صالحا مولى التوأمة أخبره أنه سمع ابن عباس يحدث عن النبي ﷺ إن الرحم شجنة آخذة بحجزة الرحمن يصل من وصلها ويقطع من قطعها
Its isnad is sahih. Ziyad is Ibn Saad bin Abdul-Rahman Khurasani, whose reliability was established earlier at 1896. Salih, the freedman of Tawama, it was mentioned earlier at 2604 that he changed after he grew old, and in Tahdhib, it is reported from Ibn Adi that Ziyad bin Saad was among those who heard from him early on. The hadith is in Majma al-Zawaid 8:150, where he said, Ahmad, Bazzar, and Tabarani related it similarly, and it contains Salih the freedman of Tawama, who became confused in his later years, while the rest of its men are the men of the Sahih. We have already shown the error in this line of reasoning.Shijnah, with the shin either with damma or kasrah, its meaning was explained earlier at 1651.As for "by the waistband of the Rahman," Ibn Athir said in 1:203 that it means "I held fast to Him and took refuge in Him seeking protection," and this is supported by what is said in the hadith, "This is the station of one seeking refuge in You from being cut off." It has also been said that its meaning is that the word rahm (kinship) is derived from the name Rahman, so it is as though it is attached to the name, grasping its middle, just as it came in another hadith, "Kinship is a shijnah from the Rahman." The original meaning of hijzah is the place where the waist-wrap is tied, and then the waist-wrap itself came to be called hijzah, by association. A man is said to "ihtajaza" with the waist-wrap when he ties it around his waist, so it was used figuratively for holding fast to something, taking refuge in it, clinging to it, and being attached to it.See also 1680, 1681, 1686, 1687.