To what extent can we rely on Ibn Ishaq's Sirat? Is the account of Quraish leaders proposing wealth, women, and kingship to Muhammad (pbuh) in exchange for renouncing his prophethood authentic?

ProphethoodQurayshIbn Ishaq
To what extent can we rely on Ibn Ishaq's Sirat? Is the account of Quraish leaders proposing wealth, women, and kingship to Muhammad (pbuh) in exchange for renouncing his prophethood authentic?
Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answer updated 3 weeks ago

1- The book known as Seerat Ibn Is-haaq سيرة ابن اسحاق was complied by order of the Abbasside Khalif Abu Ja’far Al-Mansour who was a staunch enemy of Ahlul Bayt (AS) and he killed Imam Al-Sadiq (AS) and many pious persons from the family of Ahlul Bayt (AS). Abu Ja'far Al-Mansour did a lot against Ahlul Bayt and tried to create a new sect (Maliki sect) to drive Muslims away from Ahlul Bayt (AS). 2- No doubt, Ibn Is-haaq was trying to please Al-Mansour in his book.

3- Ibn Is-haaq narrated from Ibn Shihaab Al-Zohra who spent long years from his life in serving Bani Omayyah.

4- We don't take all the book of Ibn Is-haaq as authentic but we take from it the admission from them about few facts in the early history of Islam which they try to deny in other books.

5- Seerat Ibn Hishaam (Died 213 Hijri) is the modified copy from Seerat Ibn Is-haaq (Died 151 Hijri) and it is very famous as one of the very old books in history of the Prophet Muhammad (SAWA).

Wassalam.