Other translations of verse 20
Know that the life of this world is no more than play, amusement, adornment, boasting among yourselves, and competition in wealth and children. It is like plants that flourish after rain, pleasing the sowers, then they wither and you see them turning yellow, and then they crumble. And in the Hereafter there will be severe punishment, or forgiveness from Allah and His pleasure. For the life of this world is no more than a fleeting enjoyment.
Know that the life of this world is only play and amusement, pomp and mutual boasting among you, and rivalry in respect of wealth and children. (It is) as the likeness of vegetation after rain, thereof the growth is pleasing to the tiller; afterwards it dries up and you see it turning yellow; then it becomes straw. But in the Hereafter (there is) a severe torment (for the disbelievers - evil-doers), and (there is) Forgiveness from Allâh and (His) Good Pleasure (for the believers - good-doers). And the life of this world is only a deceiving enjoyment.
Know that the life of the world is only play, and idle talk, and pageantry, and boasting among you, and rivalry in respect of wealth and children; as the likeness of vegetation after rain, whereof the growth is pleasing to the husbandman, but afterward it drieth up and thou seest it turning yellow, then it becometh straw. And in the Hereafter there is grievous punishment, and (also) forgiveness from Allah and His good pleasure, whereas the life of the world is but matter of illusion.
Know ye (all), that the life of this world is but play and amusement, pomp and mutual boasting and multiplying, (in rivalry) among yourselves, riches and children. Here is a similitude: How rain and the growth which it brings forth, delight (the hearts of) the tillers; soon it withers; thou wilt see it grow yellow; then it becomes dry and crumbles away. But in the Hereafter is a Penalty severe (for the devotees of wrong). And Forgiveness from Allah and (His) Good Pleasure (for the devotees of Allah). And what is the life of this world, but goods and chattels of deception?
Know that this world's life is only sport and play and gaiety and boasting among yourselves, and a vying in the multiplication of wealth and children, like the rain, whose causing the vegetation to grow, pleases the husbandmen, then it withers away so that you will see it become yellow, then it becomes dried up and broken down; and in the hereafter is a severe chastisement and (also) forgiveness from Allah and (His) pleasure; and this world's life is naught but means of deception.
Know that the present life (Literally: the lowly life i.e., the life of this world) is only playing and diversion, and an adornment, and a cause for mutual boasting among you, and mutual multiplying in riches and children. It is as the likeness of succoring (rain) whose growth (looks) wonderful to the steadfast disbelievers. Thereafter it heaves, then you see it (turning) yellow; thereafter it becomes crushed to pieces. And in the Hereafter there is strict torment and forgiveness from Allah and all-blessed Satisfaction; and in no way is the present life anything except the enjoyment of delusion.