Testament of Levi 18:9
Testament of the Twelve PatriarchsAnd the glory of the Most High shall be uttered over him, And the spirit of understanding and sanctification shall rest upon him [in the water]. For he shall give the majesty of the Lord to His sons in truth for evermore; And there shall none succeed him for all generations for ever. And in his priesthood the Gentiles shall be multiplied in knowledge upon the earth, And enlightened through the grace of the Lord: In his priesthood shall sin come to an end, And the lawless shall cease to do evil. [And the just shall rest in him.] And he shall open the gates of paradise, And shall remove the threatening sword against Adam. And he shall give to the saints to eat from the tree of life, And the spirit of holiness shall be on them. And Beliar shall be bound by him, And he shall give power to His children to tread upon the evil spirits. And the Lord shall rejoice in His children, And be well pleased in His beloved ones for ever.
Hebrews 9:26
24 For Christ did not enter a sanctuary made with hands—the representation of the true sanctuary—but into heaven itself, and he appears now in God’s presence for us. 25 And he did not enter to offer himself again and again, the way the high priest enters the sanctuary year after year with blood that is not his own, 26 for then he would have had to suffer again and again since the foundation of the world. But now he has appeared once for all at the consummation of the ages to put away sin by his sacrifice. 27 And just as people are appointed to die once, and then to face judgment, 28 so also, after Christ was offered once to bear the sins of many, to those who eagerly await him he will appear a second time, not to bear sin but to bring salvation.
Notes and References
"... Hebrews follows a common Christian tradition in declaring that Jesus was 'without sin' (4:15), 'holy, blameless, undefiled, separated from sinners' (7:26), who 'offered himself without blemish to God' (9:14). Hebrews' idea of Jesus' sinlessness was not derived in any simple way from current views of priesthood or messianic expectation, although it was compatible with such ideas. The messianic 'Branch' of David was to be righteous (Jeremiah 23:5-6; 3 3:15-16; Isaiah 9:7; 11:1-5), and the Messiah was to 'be clean of sin' (Psalms of Solomon 17:36) and to oppose sin and unrighteousness (17:22-32; cf. Hebrews 1:8-9). Priests were expected, not to be sinless, but to minister in a state of purity. Some anticipated an eschatological priest who would make sin to cease (CD XII, 23; Testament of Levi 18:9), and Philo spoke of the Logos as a priest, 'immune from all unrighteousness.' None of these sources, however, portrays sinlessness as obedience in suffering, as does Hebrews ..."
Koester, Craig R. Hebrews: A New Translation with Introduction and Commentary (p. 294) Yale University Press, 2010