question #1 Sahih Muslim 945b, Book 11, Hadith 68 : What is the significance of the phrase ‘two great mountains’ in Islamic teachings?

” two great mountains.” No mention is made of what followed (these words) ; and in the hadith transmitted by ‘Abd al- A’la (the words are):” till (the burial) is complete.” In the hadith transmitted by ‘Abd ar-Razzaq (the words are):” till he is placed in the grave.”