Cc. Ādi 17.164

Text

aśvamedhaṁ gavālambhaṁ
sannyāsaṁ pala-paitṛkam
devareṇa sutotpattiṁ
kalau pañca vivarjayet

Synonyms

aśvaplugin-autotooltip__small plugin-autotooltip_bigasva

by horses; cavalry; horse; horses; of a horse; of horses; on horses; the horse incarnation; with horses.
-medhamplugin-autotooltip__small plugin-autotooltip_bigmedham

a sacrifice offering a horse.
—a sacrifice offering a horse; gavaplugin-autotooltip__small plugin-autotooltip_biggava

a sacrifice of cows.
-ālambhamplugin-autotooltip__small plugin-autotooltip_bigālambham

being constantly in contact.
—a sacrifice of cows; sannyāsamplugin-autotooltip__small plugin-autotooltip_bigsannyāsam

renounced order of life; renunciation; the renounced order of life.
—the renounced order of life; palaplugin-autotooltip__small plugin-autotooltip_bigpala

of the scale of weight; palas.
-paitṛkamplugin-autotooltip__small plugin-autotooltip_bigpaitṛkam

an offering of oblations of flesh to the forefathers.
—an offering of oblations of flesh to the forefathers; devareṇaplugin-autotooltip__small plugin-autotooltip_bigdevareṇa

by a husband's brother.
—by a husband’s brother; sutaplugin-autotooltip__small plugin-autotooltip_bigsuta

children; his son; of sons; son; sons.
-utpattimplugin-autotooltip__small plugin-autotooltip_bigutpattim

begetting children.
—begetting children; kalauplugin-autotooltip__small plugin-autotooltip_bigkalau

at the end of Kali-yuga; in the age of Kali; in the Kali-yuga; in this age of Kali (quarrel); in this age of Kali; in this Kali-yuga; the age of Kali.
—in the Age of Kali; pañcaplugin-autotooltip__small plugin-autotooltip_bigpanca

all five; all five qualities; five; five different varieties of products from the cow, namely milk, yogurt, clarified butter, cow dung and cow urine; five pots; five sons; the fifth; the five; the five objects of the senses (sound, form, touch, aroma and taste).
—five; vivarjayetplugin-autotooltip__small plugin-autotooltip_bigvivarjayet

one must give up.
—one must give up. 

Translation

“ ‘In this Age of Kali, five acts are forbidden: the offering of a horse in sacrifice, the offering of a cow in sacrifice, the acceptance of the order of sannyāsa, the offering of oblations of flesh to the forefathers, and a man’s begetting children in his brother’s wife.' 

Purport

This is a quotation from the Brahma-vaivarta Purāṇa (Kṛṣṇa-janma-khaṇḍa 185.180).