In the prophetical writings the name of Moses as attached to the law occurs only Mal. Moses' name appears in Psalms lxxvii., xcix. Moses gives no testimony for his authorship of the whole, since Ex. 27, and Num. 2 concern only portions, while Deut.
External testimony is therefore inconclusive.
Regarding the citations from the New Testament it is to be remarked that they testify simply to the current opinion of the times. Were they an essential part of the authoritative teaching of the New Testament they would be decisive in themselves, and any introduction of further proof would be a setting aside of the authority of the Lord and his disciples. But none of the advocates of the Mosaic authorship of the Pentateuch who have made themselves soquainted with the difficulties and development of the question have gone so far as to assert that the Mosaic authorship of the Pentateuch is conclusively decided by the manner in which the books are referred to by the Lord and his apostles and that no further proof is required. From the contents, and especially from the composition of the Pentateuch, reasons appear which show that the Pentateuch is neither 4. Internal by Moses nor by a contemporary, nor Testimony.