"When you eat food, take off your sandals, for that is more restful for your feet." Tabarani's narrators are thiqat (trustworthy), except for Uqbah bin Khalid al-Sakuni: I have not found any report that he heard from Muhammad bin al-Harith.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأطعمة / 7912