ENOfficial
He told that Ibn Sayyad asked the Prophet (ﷺ) about the soil of paradise and that he replied it was a white, sifted flour and pure musk. Muslim transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْهُ أَنَّ ابْنَ صَيَّادٍ سَأَلَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ تُرْبَةِ الْجَنَّةِ. فَقَالَ: «در مَكَّة يبضاء ومسك خَالص» . رَوَاهُ مُسلم
sunnah.com