Musannaf Ibn Abi Shayba 13:2542

Abu Bakr narrated to us, he said: Abu Ya’la narrated to us, from al-Kalbi, from Abu Salama, from Abu Rafi’, from Abu Bakr, he said: I heard the Prophet, may Allah bless him and grant him peace, saying: "Gold for gold, weight for weight, and silver for silver, weight for weight. The one who gives more and the one who asks for more are in the Fire."