Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) used to say: "Lying is not permissible in any form, neither in seriousness nor in jest, nor is it proper that a man should promise someone something and then not fulfil it." He also related that Muhammad (peace and blessings be upon him) said to us: "Shall I not tell you what 'adh' is? It is tale-bearing (namimah), that is, carrying talk back and forth among people to create discord." And (he related that) Muhammad (peace and blessings be upon him) said: "A man keeps on telling the truth until he is recorded with Allah as a siddiq (truthful one), and a man keeps on lying until he is recorded with Allah as a kadhdhab (liar). Do you not see that about the truthful one it is said: 'He spoke the truth and did good', and about the liar it is said: 'He lied and sinned'? Indeed, truthfulness leads to righteousness and righteousness leads to Paradise, and lying leads to sin and sin leads to Hell."
Hadith Referenceمسند أبي يعلى الموصلي / مسند عبد الله بن مسعود / 5363
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«حکم الحدیث مسند ابی یعلی محققاً تنسیق حسين سليم أسد - مکتبہ شاملہ :قال حسين سليم أسد: إسناده صحيح . » «قال سعيد بن محمد السناري: صحيح: مضى الكلام عليه [برقم 5138]، وفى متنه إدراج سبق التنبيه عليه هناك. واللَّه المستعان» «أخرجه المعجم الكبير للطبراني برقم: 8522، وأخرجه المعجم الأوسط للطبراني برقم: 7867، وأخرجه مجمع الزوائد ومنبع الفوائد برقم: 6318، وأخرجه شرح مشكل الآثار برقم: 4207، مسند ابویعلیٰ ترقیم الاثری: 5341»