question #3 Sahih Muslim 8c, Book 1, Hadith 3 : What role do companions of the Prophet play in transmitting hadiths about theological concepts?

We met Abdullah b. ‘Umar and we discussed about the Divine Decree, and what they talked about it and he narrated the hadith that has been transmitted by ‘Umar (may Allah be pleased with him) from the Apostle (ﷺ). There is a slight variation in that.