SB 11.26.3

saṅgam — association; na kuryāt — one should never make; asatām — of those who are materialistic; śiśna — the genitals; udara — and the belly; tṛpām — who are devoted to gratifying; kvacit — at any time; tasya — of any such person; anugaḥ — the follower; tamasi andhe — into the darkest pit; patati — he falls; andha-anuga — following a blind man; andha-vat — just like another blind man.