Mishkat al-Masabih
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 reported: It is part of the Sunnah, when a man sits down, to take off his sandals and place them beside him. Abu Dawud transmitted it.