Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
KJV

Exodus 26:21

And their forty sockets of silver; two sockets under one board, and two sockets under another board.

Parallel Translations

LXXView canonical →
and their forty silver sockets: two sockets to one post on both its sides, and two sockets to the other post on both its sides.
Brenton's Septuagint Translation
LXX2012View canonical →
and their forty silver sockets: two sockets to one post on both its sides, and two sockets to the other post on both its sides.
Septuagint in American English (2012)
WEBView canonical →
and their forty sockets of silver; two sockets under one board, and two sockets under another board.
World English Bible