Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: When the Messenger of Allah (peace and blessings be upon him) was placed in his grave, Shuqran took a velvet cloth (qatifah) which the Messenger of Allah (peace and blessings be upon him) used to wear and spread out, and buried it with him in the grave, and said: "By Allah! No one will wear it after you." So it was buried with the Messenger of Allah (peace and blessings be upon him). So in this narration, if it is established, there is evidence that they did not spread it in the grave as an application of the Sunnah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6722