Ammar (may Allah be pleased with him) said: We were three (such) people with the Messenger of Allah (peace and blessings be upon him), all of whom were 'adbat'. Abu Shaybah was asked: What is 'adbat'? He said: The one who works with both his hands (with equal skill). (Those three were) Dhu al-Shimalayn, Umar bin al-Khattab and Abu Layla.
Hadith Referenceالمعجم الكبير للطبراني / باب الذال / 4208