It is narrated from Sayyiduna Uthman (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Allah Almighty will surely admit to Paradise the person who is gentle, whether he is a buyer or a seller, one who pays or one who demands payment."
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 508
Hadith Gradingحکم دارالسلام:حسن لغيره، وله شاهد من حديث جابر فى الصحيح البخاري : 2076 وغيره، عطاء بن فروخ لم يلق عثمان، وانظر: 410