SB 8.19.14

pitā prahrāda-putras te
 tad-vidvān dvija-vatsalaḥ
svam āyur dvija-liṅgebhyo
 devebhyo ’dāt sa yācitaḥ
Word for word: 
pitā — father; prahrāda-putraḥ — the son of Mahārāja Prahlāda; te — your; tat-vidvān — although it was known to him; dvija-vatsalaḥ — still, because of his affinity for brāhmaṇas; svam — his own; āyuḥ — duration of life; dvija-liṅgebhyaḥ — who were dressed like brāhmaṇas; devebhyaḥ — unto the demigods; adāt — delivered; saḥ — he; yācitaḥ — being so requested.
Translation: 
Your father, Virocana, the son of Mahārāja Prahlāda, was very affectionate toward brāhmaṇas. Although he knew very well that it was the demigods who had come to him in the dress of brāhmaṇas, at their request he delivered to them the duration of his life.
Purport: 

Mahārāja Virocana, Bali’s father, was so pleased with the brāhmaṇa community that even though he knew that those approaching him for charity were the demigods in the dress of brāhmaṇas, he nonetheless agreed to give it.