Chanting & Veda study
rg-vedo ‘tha yajur-vedahsama-vedo ‘py atharvanahadhitas tena yenoktamharir ity aksara-dvayam “A person who chants the two syllables ha-ri has already studied the four Vedas-Sama, Rg, Yajur and Atharva.” Quoted in Srila Prabhupada’s purport to Sri Caitanya-caritamrta Adi-lila 7.72