Sayyida Asma bint Yazid (may Allah be pleased with her) narrated: I heard the Messenger of Allah (peace and blessings be upon him) say: "Lying is permissible only in three matters: a man lies to his wife so that she may be pleased with him, a man lies to reconcile between people, and a man lies in war."
Hadith Referenceمسند اسحاق بن راهويه / كتاب البر و الصلة / 801
Hadith Takhrij«مسلم ، كتاب البروالصلة ، باب تحريم الكذب المباح منه ، رقم : 2605 . سنن ابوداود ، رقم : 4921 . سنن ترمذي ، رقم : 1939 .»