What is the authenticity of the hadith narrated by Abdullah ibn Amr ibn al-'As from the Prophet, may Allah bless him and grant him peace, concerning the increase in lifespan due to maintaining kinship ties and its decrease due to severing them?

The aforementioned hadith has a weak chain of narration (isnad), as Ibn al-Mulaqqin indicated, citing its transmission from Abu Musa al-Madini. However, its isnad includes: - Zaidah ibn Abi al-Raqqad: Declared as having Munkar Hadith (rejected hadith) by Al-Bukhari, and numerous imams deemed him weak. - Musa ibn al-Sabah: It is unknown whether he heard from Abdullah ibn Amr, in addition to being an unknown narrator, as is Ikrimah ibn Ibrahim. - Husayn ibn Ja'far: An unknown narrator (majhul).

Despite the weakness of this hadith, maintaining kinship ties (silat al-rahim) is indeed a cause for a long life, and this has been confirmed in other hadiths.