Abū Hurayrah – Allāh be pleased with him – once saw two men. He asked one of them,
“How is this man related to you?” He replied, “He is my father.” Abū Hurayrah said, “Do not call him by his name, do not walk in front of him and do not sit before he does.”
Al-Bukhārī, Al-Adab Al-Mufrad.