SB 10.45.6

yas tayor ātmajaḥ kalpa
 ātmanā ca dhanena ca
vṛttiṁ na dadyāt taṁ pretya
 sva-māṁsaṁ khādayanti hi
Word for word: 
yaḥ — who; tayoḥ — of them; ātma-jaḥ — a son; kalpaḥ — capable; ātmanā — with his physical resources; ca — and; dhanena — with his wealth; ca — also; vṛttim — a livelihood; na dadyāt — does not give; tam — him; pretya — after passing away; sva — his own; māṁsam — flesh; khādayanti — they make eat; hi — indeed.
Translation: 
A son who, though able to do so, fails to provide for his parents with his physical resources and wealth is forced after his death to eat his own flesh.