Sirach 28:20

20 For the yoke thereof is a yoke of iron, and the bands thereof are bands of brass.

Sirach 28:20 In-Context

18 Many have fallen by the edge of the sword: but not so many as have fallen by the tongue.
19 Well is he that is defended through the venom thereof; who hath not drawn the yoke thereof, nor hath been bound in her bands.
20 For the yoke thereof is a yoke of iron, and the bands thereof are bands of brass.
21 The death thereof is an evil death, the grave were better than it.
22 It shall not have rule over them that fear God, neither shall they be burned with the flame thereof.

The Brenton translation of the Septuagint is in the public domain.