Abu Ushshanah reported that he saw Sayyiduna Uqbah bin Amir al-Juhani (may Allah be pleased with him) dyeing (his hair) with black and saying: "You blacken it on top, but the roots keep to their original colour." The narrator said: He was also a poet.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14808