﴿ وَحَمَلْنَٰهُ عَلَىٰ ذَاتِ أَلْوَٰحٍۢ وَدُسُرٍۢ ﴾

“but him We bore on that [vessel] made of [mere] planks and nails,”

And We bore him that is Noah on one a ship made of planks and nails dusur is what boards are fastened down with of nails and the like; the singular is disār similar in pattern to kutub kitāb ‘book’