Discovery BoxNumbers 4:6 
Context4:6 Then they must put over it a covering of fine leather 1 and spread over that a cloth entirely of blue, and then they must insert its poles.
Numbers 31:14
Context31:14 But Moses was furious with the officers of the army, the commanders over thousands and commanders over hundreds, who had come from service in the war.
1 tn The exact meaning of the Hebrew word here is difficult to determine. The term תַּחַשׁ (takhash) has been translated “badgers’ [skins]” by KJV. ASV has “sealskin” while RSV uses “goatskin”; NEB and NASB have “porpoise skin,” and NIV has “hides of sea cows.” This is close to “porpoise,” and seems influenced by the Arabic. The evidence is not strong for any of these meanings, and some of the suggestions would be problematic. It is possible the word is simply used for “fine leather,” based on the Egyptian ths. This has been followed by NRSV (“fine leather”) and NLT (“fine goatskin leather”) along with the present translation. See further HALOT 1720-21 s.v. תַּחַשׁ.
