Sayyiduna Suwayd bin Qays (may Allah be pleased with him) said: Makhramah al-Abdi and I brought cloth from Hajar and took it to Makkah. The Messenger of Allah (peace and blessings be upon him) came to us at Mina and bought a pair of trousers (sirwal) from us. There was a weigher there who weighed for a wage, and he (peace and blessings be upon him) said: "O weigher, weigh and give good measure (tilt the scale)."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6436