Sandals - Section 2 Mishkat al-Masabih 4417
Arabic hadith text
وَعَن ابنِ عبَّاسٍ قَالَ: مِنَ السُّنَّةِ إِذَا جَلَسَ الرَّجُلُ أَنْ يَخْلَعَ نَعْلَيْهِ فَيَضَعَهُمَا بِجَنْبِهِ. رَوَاهُ أَبُو دَاوُدَ
Translation
Ibn Abbas said it is part of the sunna that when a man sits down he should take off his sandals and place them at his side. Abu Dawud transmitted it.