Grass bedding in South Africa’s Border cave dates back 227,000 years, and was put on top of ash to help keep biting insects away
Source:
https://www.newscientist.com/article/2251738-earliest-known-beds-are-227000-year-old-piles-of-grass-and-ash/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home