Thereafter, Vedic hymns which had not been pronounced before, priestly rituals, the subject matters of the recitation, and transcendental activities were all established, one after another

Expressions researched:
"Thereafter, Vedic hymns which had not been pronounced before, priestly rituals, the subject matters of the recitation, and transcendental activities were all established, one after another"

SB Canto 3

Maitreya said: Beginning from the front face of Brahmā, gradually the four Vedas—Ṛk, Yajur, Sāma and Atharva—became manifest. Thereafter, Vedic hymns which had not been pronounced before, priestly rituals, the subject matters of the recitation, and transcendental activities were all established, one after another.

SB 3.12.37, Translation:

Maitreya said: Beginning from the front face of Brahmā, gradually the four Vedas—Ṛk, Yajur, Sāma and Atharva—became manifest. Thereafter, Vedic hymns which had not been pronounced before, priestly rituals, the subject matters of the recitation, and transcendental activities were all established, one after another.