The Messenger of Allah ﷺ said, "The womb is a branch attached to the Most Merciful. Whoever severs it, Allah will forbid Paradise to him."
قال رسول الله ﷺ: الرحم شجنة من الرحمن، فمن قطعها حرم الله عليه الجنة.
Ahmad (1651) and Bazzar (1265) narrated it, and Hakim declared it sahih (4/157), all of them through Abu Yaman, who said, Shuayb informed us, from Abdullah bin Abdul-Rahman bin Abu Husayn, from Nawfal bin Musahiq, from Saeed bin Zayd, who said, then he mentioned it. Its chain is sahih.His statement, "Allah has forbidden Paradise to him," means initial entry, and Allah will then admit him to Paradise if he was among the people of monotheism.