SB 12.7.1
suta uvaca
atharva-vit sumantus ca
sisyam adhyapayat svakam
samhitam so ’pi pathyaya
vedadarsaya coktavan
Translation:
Suta Gosvami said: Sumantu Rsi, the authority on the Atharva Veda, taught his samhita to his disciple Kabandha, who in turn spoke it to Pathya and Vedadarsa.
Purport:
As confirmed in the Visnu Purana:
atharva-vedam sa munih
sumantur amita-dyutih
sisyam adhyapayam asa
kabandham so ’pi ca dvidha
krtva tu vedadarsaya
tatha pathyaya dattavan
“That sage Sumantu, whose brilliance was immeasurable, taught the Atharva Veda to his disciple Kabandha. Kabandha in turn divided it into two parts and passed them down to Vedadarsa and Pathya.”