Musar su Salmi 49:11

Always focus your attention on these matters and not on others, because all else is trivial. For man can salvage nothing from his labor to take with him (see Koheles 5:14), except two white garments (shrouds). Also (Tehillim 49), "A man will not redeem his brother...Fear not when a man grows rich...For when he dies, he shall carry nothing away...." Don't say, "I will leave a portion for my children" - who will tell you in the grave? The children of man are like grasses of the field, some blossom and some fade (Eruvin 54a). Everyone is born under his constellation and Divine Providence. They are glad when he dies and he goes into the nether world. [At his death] Resh Lakish left his children a kav of saffron, and he applied to himself the verse (Tehillim 49:11), "...and they leave their wealth to others" (Gittin 47a). Woe to all who plan on leaving [wealth] to their children! The only reward from sons and daughters is through their Torah and good deeds. Their sustenance is fixed for them. It is also known that women earn merit by making their children learn Torah etc. (Berachos 17a)

How much more so if he squanders the wages of his toil for educating his children in the "new ways," teaching them foreign studies and removing them from the Torah of the L-rd. Is his toil not "not for him"? To the contrary, he must yet render judgment and accounting for having removed his children from the Torah of the L-rd. And, similarly, if he toils until old age in order to leave a blessing [i.e., an inheritance] for his sons after him, this, too, is not for him. As Resh Lakish, who left over for his sons a kav of saffron, said about himself (Psalms 99:11): "And they leave their wealth to others." (Gittin 47a).

The point of this analogy is this: If a person gives charity while he is alive it is said of him, “And your charity shall go before you.” Then he has nothing to fear from the “enemy,” for “the honor of Hashem will gather him in” without any opposition from any accuser. But if he does not give until after his death, who knows whether he will even receive credit for it since the dead are exempt from the commandments? Concerning the first group it is written, “And they leave their wealth to others” (Tehillim 49:11). And even if their own sons inherit their wealth, nevertheless they themselves may have no satisfaction from it even after death. For I have seen new attitudes afoot and the masses have become very casual towards the honor of deceased parents. They make for themselves black mourning garments of the finest quality, all in the latest gentile fashion, and then indulge themselves in feasting. Meanwhile they treat with disdain the honor of the parent whom they are meant to be eulogizing and mourning. This is entirely the father’s own fault, for when one casts a stick into the air it comes back down on one’s head (Midrash Bereishis Rabbah 53:15). Therefore there is no greater foolishness than this and no more need be said about the matter.