SB 6.1.67
yad asau sastram ullanghya
svaira-cary ati-garhitah
avartata ciram kalam
aghayur asucir malat
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
This brahmana irresponsibly spent his long lifetime transgressing all the rules and regulations of the holy scripture, living extravagantly and eating food prepared by a prostitute. Therefore he is full of sins. He is unclean and is addicted to forbidden activities.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Food prepared by an unclean, sinful man or woman, especially a prostitute, is extremely infectious. Ajamila ate such food, and therefore he was subject to be punished by Yamaraja.