The Messenger of Allah ﷺ said, "The womb relations, whoever maintains them, Allah maintains ties with him, and whoever severs them, Allah severs ties with him."
حدثنا وكيع قال حدثنا معاوية بن أبي مزرد عن يزيد بن رومان عن عروة بن الزبير
قال رسول الله ﷺ الرحم من وصلها وصله الله ومن قطعها قطعه الله
Its isnad is sahih. Yazid bin Ruman is trustworthy, his hadith is found in the collections of the group. Muawiya bin Abu Muzarrid is trustworthy, his hadith is found in the Sahihayn. The hadith was narrated by Bukhari, 8/579, no. 4830, in tafsir, from Abu Hurairah. And Muslim, 4/1980, no. 2555, in chapters on righteousness.