فقه الأخلاق
‘Abdullāh ibn ‘Abbās (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Do not argue with your brother, nor joke with him (in a way that harms him), nor promise him and then break your promise."  
عن عبد الله بن عباس -رضي الله عنهما- مرفوعاً: «لا تُمارِ أخاكَ, ولا تُمازِحْه, ولا تَعِدْهُ مَوعِدًا فَتُخْلِفَه».

شرح الحديث :


The Prophet (may Allah's peace and blessings be upon him) forbade the kind of argument which some people adopt with their companion in order to show the faults in his speech and mistakes in his opinion. Indeed, this is a blameworthy attitude. He also forbade excessive joking because it leads to hardness of the heart, causes annoyance and incites grudges. He also forbade breaking promises, because this is also something that incites grudges. So one should either refrain from making promises, or make a promise and keep your promise.  

ترجمة نص هذا الحديث متوفرة باللغات التالية