Imam Malik says it's disliked to pray on anything other than organic material

We read in "Minh'aj-Al-Sunnah Al-Nabawiyah (منهاج السنة النبوية)," By Ibn-Tamiyah ( ابن تيمية الحراني الحنبلي الدمشقي)" Investigated By: Muhamamd Rashid Salam (محمد رشاد سالم), The first print (1406): volume 4, page #151:


وَكَذَلِكَ قَالَ مَالِكٌ: إِنَّ السُّجُودَ يُكْرَهُ عَلَى غَيْرِ جِنْسِ الْأَرْضِ، وَالرَّافِضَةُ يَمْنَعُونَ مِنَ (7) السُّجُودِ عَلَى غَيْرِ الْأ

And also said Malik: "Prostration is Makr'ooh, other than that originates from earth, and Al-Rafith'a do not allow protestation other than the earth (Soil, Has'eer, etc).