Riyad as-Saliheen 249
Umm Kulthum bint 'Uqbah (May Allah be pleased with her) reported:
Messenger of Allah ﷺ said, 'The person who (lies) in order to conciliate between people is not a liar, when he conveys good or says (something) good".
[Al-Bukhari and Muslim].
The narration in Muslim added: She said, "I never heard him (she meant the Prophet ﷺ) giving permission of lying in anything except in three (things): war, conciliating between people and the conversation of man with his wife and the conversation of a woman with her husband".
وعن أم كلثوم بنت عقبة بن أبي معيط رضي الله عنها قالت سمعت رسول الله ﷺ يقول:
"ليس الكذاب الذي يصلح بين الناس فينمي خيرًا، أو يقول خيرًا" ((متفق عليه)).
Classification
Sahih (Authentic)
References
Riyad as-Saliheen 249
Riyad as-Saliheen Book of Miscellany, Hadith 249