It is narrated from Hazrat Bara (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) was on a journey, and in one rak'ah of the Isha prayer, he (peace and blessings be upon him) recited Surah Wat-Teen.
Hadith Referenceمسند احمد / أول مسند الكوفيين / 18503