SB 11.27.7
vaidikas tantriko misra
iti me tri-vidho makhah
trayanam ipsitenaiva
vidhina mam samarcaret
Translation:
One should carefully worship Me by selecting one of the three methods by which I receive sacrifice: Vedic, tantric or mixed.
Purport:
Vaidika refers to sacrifice performed with mantras from the four Vedas and auxiliary Vedic literature. Tantrika refers to such literatures as the Pañcaratra and the Gautamiya-tantra. And “mixed” indicates utilization of both literatures. It should be remembered that superficial imitation of elaborate Vedic sacrifices will not bring one the actual perfection of life. One must perform sacrifice according to the prescription of the Supreme Lord, who recommends for this age the chanting of His holy names: Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare.