It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) concerning this saying of Allah Almighty: "Ta Ha" [Surah Ta Ha: 1] ; he said: In the Abyssinian language, its meaning is equivalent to "O Muhammad!" This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.