Sirach 45:15 in 1 translation
Every translation here words this verse identically, which is itself worth knowing — there is no interpretive fork to weigh.
Early modern English
Seventeenth-century wording and sentence shape. Familiar, rhythmic, and the version most quotations you have heard are taken from.
Moses consecrated him, and anointed him with holy oil: this was appointed unto him by an everlasting covenant, and to his seed, so long as the heavens should remain, that they should minister unto him, and execute the office of the priesthood, and bless the people in his name.
1611 / 1769 · Public domain · The Authorised Version, revised to the 1769 Blayney text. Includes the Apocrypha as printed in 1611.
The verses either side
King James text. A comparison is easier to judge when you can see the sentence the verse sits inside.
Not shown for this verse: American Standard Version, Darby Bible, Young's Literal Translation, World English Bible, Open English Bible (US), Open English Bible (Commonwealth), Bible in Basic English. Most modern translations do not include the Apocrypha.