I was beneath the mount of the Messenger of Allah ﷺ on the day of the Conquest, and he spoke beautiful and noble words. Among what he said was, "Whoever from the People of the two Scriptures embraces Islam shall have his reward twice over, and he shall have what we have and bear what we bear. And whoever from the polytheists embraces Islam shall have his reward, and he shall have what we have and bear what we bear."
إني لتحت راحلة رسول الله ﷺ يوم الفتح، فقال قولا حسنا جميلا، وكان فيما قال: من أسلم من أهل الكتابين فله أجره مرتين، وله ما لنا، وعليه ما علينا، ومن أسلم من المشركين فله أجره، وله ما لنا، وعليه ما علينا.
Ahmad (22234) narrated it from Yahya bin Ishaq Silhini, who said, Ibn Lahia narrated to us, from Sulayman bin Abdul-Rahman, from Qasim, from Abu Umamah, and he related it.In the chain is Ibn Lahia, about whom there is well-known discussion due to his confusion in later life, but Tabari narrated it in his Tafsir (22/441), and Tahawi in Sharh Mushkil (2571), both through the route of Abdullah bin Wahb, from Abdullah bin Lahia, in the same manner. The narration of Ibn Wahb from Ibn Lahia is more reliable than others.Likewise, Ibn Lahia is also corroborated. Tabari narrated it in his Tafsir (22/441), and Tahawi in Sharh Mushkil (2571), and Tabarani in al-Kabir (8/224), both through the route of Layth bin Saad, from Sulayman bin Abdul-Rahman, in the same manner.Sulayman bin Abdul-Rahman and his teacher Qasim, who is Qasim bin Abdul-Rahman Dimashqi, both make the hadith hasan.