And he is quoting from the Torah:
Deuteronomy 30:11-15 LXX Brenton English Translation
11 For this command which I give thee this day is not grievous, neither is it far from thee.
12 It is not in heaven above, as if there were one saying, Who shall go up for us into heaven, and shall take it for us, and we will hear and do it?
13 Neither is it beyond the sea, saying, Who will go over for us to the other side of the sea, and take it for us, and make it audible to us, and we will do it?
14 The word is very near thee, in thy mouth, and in thine heart, and in thine hands to do it.
15 Behold, I have set before thee this day life and death, good and evil.
Deuteronomy 30:19 LXX Brenton English Translation
19 I call both heaven and earth to witness this day against you, I have set before you life and death, the blessing and the curse: choose thou life, that thou and thy seed may live;