With the rise of Karaism Bible criticism received new encouragement, as in the warfare between Karaism and Rabbinism, or Scripturalists and Traditionalists, it furnished both sides with sharp weapons. Some, however, of the commentators went further, and gave utterance to all sorts of heterodox views. Thus a certain Yitzchaki of Spain was of opinion that Gen. xxxvi. 31–43 was a later addition, on account of the phrase, “These were the kings who ruled over Edom before a king ruled over Israel.” The critics forgot that this passage is intended to point out the advance which Esau’s descendants had made, when the prophecy, “And kings shall come forth out of thee” (xxxv. 11) had not yet been fulfilled in the case of the Israelites. Of the Commentators of the Middle Ages, Ibn Ezra is generally singled out as an advanced scholar who held certain passages of the Pentateuch as later additions. Ibn Ezra was far from such views, and he sharply rebuked those who entertained them. Thus he says of Yitzchaki, the author of the above criticism, “Every one who will hear this will laugh at him, and his book deserves to be burnt.” With equal vigour he criticises a grammarian who pointed out certain passages as grammatically incorrect, and also another scholar who in his interpretations of the Bible did not take sufficient notice of the traditional accents. The error concerning Ibn Ezra has its origin in his habit of adding the phrase, “The words have some deeper sense” (‏יש לו סוד‎), whenever the literal interpretation does not quite satisfy him, or when the object of the author in adding a seemingly superfluous sentence is not clear to him; as, for instance, in the four passages referred to in the Commentary on Deuteronomy i. 2, namely, “The Canaanite was then in the land” (Gen. xii. 6), “On the mount of the Lord will it appear” (Ibid. xxii. 14), the repetition of the sacrifices of the twelve princes (Num. vii.), and the stations enumerated in Numbers (chap. xxxiii.), in addition to the detailed geographical description of Deut. i. 1 sqq. The meaning of this remark has been misunderstood by the early expounders of Ibn Ezra’s Commentary, and since then the mistake has been repeated by most of the critics of the Bible. Spinoza, in his theological treatise, quotes Ibn Ezra, with the usual misinterpretation, in support of his view concerning the Torah.