Abû Hurayrah – Allâh 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.” Abû Hurayrah said,
“Do not call him by his name, do not walk in front of him and do not sit before he does.”
Al-Bukhârî, Al-Adab Al-Mufrad. Shaykh Al-Albânî graded its chain of transmission sahîh in Sahîh Al-Adab Al-Mufrad Vol. 1 p19.
Source: http://www.sayingsofthesalaf.net/index.php/tag/abu-hurayrah/
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