(And of mankind) the reference here is to al-Nadr Ibn al-Harith (is he who payeth for mere pastime of discourse) discourse of falsehood, books on legends, on the sun, the stars, mathematics and singing; it is also said this means: associating partners with Allah, (that he may mislead) by means of it (from Allah's way) from Allah's religion and obedience (without knowledge) or proof, (and maketh it the butt of mockery. For such there is a shameful doom) for these, there is a severe chastisement.