Humayd bin Abd al-Rahman bin Awf (may Allah have mercy on him) said that his mother, Umm Kulthum bint Uqbah (may Allah be pleased with her), informed him that she heard the Messenger of Allah (peace and blessings be upon him) saying: "The man who spreads good or speaks good is not a liar." And she stated that permission to lie is given only on three occasions: 1. in war, 2. in reconciling between people, 3. a wife's (speech) to her husband and a husband's to his wife. Umm Kulthum (may Allah be pleased with her) was among the early Emigrants who pledged allegiance to the Prophet (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20832