3 times in Timothy and Titus it is mentioned, Above accusation or not accused (I think one of the versions states it that way) is probably a better way to put it. Jesus had no capacity to sin - He was perfect by nature - He was not beyond temptation but incapable of sin. That is the only way he could be a perfect sacrifice.

Tit_1:7  For an overseer, as God's steward, must be above reproach. He must not be arrogant or quick-tempered or a drunkard or violent or greedy for gain,

Tit_1:6  if anyone is above reproach, the husband of one wife, and his children are believers and not open to the charge of debauchery or insubordination.

1Ti_3:2  Therefore an overseer must be above reproach, the husband of one wife, sober-minded, self-controlled, respectable, hospitable, able to teach,