Shemot 36:20-22

Orthodox Jewish Bible

²⁰ And he made kerashim (planks) for the Mishkan of acacia wood, standing erect.

²¹ The length of a keresh (plank) was ten cubits, and the width of a keresh one cubit and a half.

²² One keresh had two yadot (projections, tenons), equally distant one from another; thus did he make for all the kerashim of the Mishkan.