To perform prayer on the straw mat

 233. Ishaq bin ´Abdullah bin Abu Talhah reported that Anas bin Malik narrated: ´´My grand-mother Mulaikah invited the Messenger of Allah salla alayhi wa sallam for a meal which she prepared. He are from it and said, ´Get up! I will lead you in prayer.´´ Anas bin Malik added, ´´I took our straw mat, washed it with water as it had become dark because of long use, and the Messenger of Allah salla alayhi wa sallam stood on it. The orphan and I lined up behind him and the old lady (Mulaikah) stood behind ud. The Messenger of Allah salla alayhi wa sallam led us in prayer and performed two Rak´ah and left.´´