It is narrated from Sayyidah Umm Khalid bint Khalid (may Allah be pleased with her); she said: "The Prophet (peace and blessings be upon him) clothed me in a striped khamisah, and he kept stroking it with his hand and saying: Saniyyah." And saniyyah in the Abyssinian language means "tayyib (good)".
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21703