See you not that they speak about every subject in their poetry!Ali bin Abi Talhah reported from Ibn Abbas that this means:"They indulge in every kind of nonsense."Ad-Dahhak reported that Ibn Abbas said,"They engage in every kind of verbal art."This was also the view of Mujahid and others.وَأَنَّهُمْ يَقُولُونَ مَا لَاأ يَفْعَلُونَ