The existence of the Pentateuch at the time when the other Biblical books were written is clear from the frequent references to the history and the laws contained in it. Such are, e.g.: “Only be thou strong and very courageous, that thou mayest observe to do according to all the law which Moses, my servant, commanded thee,” &c. “This book of the law shall not depart out of thy mouth,” &c. (Jos. i. 7, 8). “As Moses, the servant of the Lord, commanded the children of Israel, as it is written in the book of the law of Moses,” &c. “And he wrote there upon the stones a copy of the law of Moses which he wrote in the presence of the children of Israel. And afterward he read all the words of the law, the blessing and cursing, according to all that is written in the book of the law” (Ibid. viii. 31, 32, 34). “Keep the charge of the Lord thy God, to walk in his ways, to keep his statutes and his commandments, and his judgments, and his testimonies, as it is written in the law of Moses,” &c. (1 Kings ii. 3). “But the children of the murderers he slew not: according unto that which is written in the book of the law of Moses,” &c. (2 Kings xiv. 6). “Keep the passover unto the Lord your God, as it is written in the book of the covenant” (Ibid. xxiii. 21). “Remember the law of Moses, my servant, which I commanded unto him in Horeb for all Israel, statutes and judgments” (Mal. iii. 16). The authors of the other books of the Bible show familiarity with the words, the phrases, and the contents of the Pentateuch. Thus Psalm civ. is based on the first chapter of Genesis; the flood is mentioned in Ps. xxix. and in the prophecies of Isaiah (liv. 9); the history of the Patriarchs and of the Israelites in Egypt and in the wilderness in Ps. cvi., lxxviii.; the history of Jacob is alluded to in Hosea xii.; the destruction of Sodom and Gomorrah in Isa. i. 9, Amos iv. 11.