Malachi 2:7

2:7 For the lips of a priest should preserve knowledge of sacred things, and people should seek instruction from him ¹  because he is the messenger of the Lord who rules over all.

John 3:10

3:10 Jesus answered, ²  “Are you the teacher of Israel and yet you don’t understand these things? ³ 

[2:7]  ¹ tn Heb “from his mouth” (so NAB, NASB, NRSV).

[3:10]  ² tn Grk “Jesus answered and said to him.”

[3:10]  ³ sn Jesus’ question “Are you the teacher of Israel and yet you don’t understand these things?” implies that Nicodemus had enough information at his disposal from the OT scriptures to have understood Jesus’ statements about the necessity of being born from above by the regenerating work of the Spirit. Isa 44:3-5 and Ezek 37:9-10 are passages Nicodemus might have known which would have given him insight into Jesus’ words. Another significant passage which contains many of these concepts is Prov 30:4-5.