that they [children] be taught to read, and shall learn both the laws and deeds of their ancestors.” in the prophet Isaiah: Isaiah and the Psalms were the most popular OT books both at Qumran and in early Christian literature. Since the verses quoted in Mark 1:2–3 are a combination of Exod 23:20 and Mal 3:1 in 1:2 and Isa 40:3 in 1:3, some manuscripts substitute “prophets.” The mixed quotation suggests to some scholars the use of a pre-Markan testimonia collection of OT texts assembled with reference
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