Imran bin Musa narrates from his father that Sayyiduna Uthman bin Affan (may Allah be pleased with him), while he was on the pulpit on Friday delivering the sermon, said to a man: "Did you buy this for our family?" Or he pointed with the tip of his finger, meaning (this was) during the sermon.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5845