To prove the antiquity and authenticity of their claims, the Beta Israel cite the 9th-century CE testimony of Eldad ha-Dani (the Danite), from a time before the Zagwean dynasty was established. Eldad was a Jewish man of dark skin who appeared in Egypt and created a stir in that Jewish community (and elsewhere in the Mediterranean Jewish communities he visited) with claims that he had come from a Jewish kingdom of pastoralists far to the south. The only language Eldad spoke was a hitherto unknown dialect of Hebrew. Although he strictly followed the Mosaic commandments, his observance differed in some details from Rabbinic halakhah. Some observers thought that he might be a Karaite, although his practice also differed from theirs. He carried Hebrew books that supported his explanations of halakhah. He cited ancient authorities in the scholarly traditions of his own people.