Shiva Purana

siva.sh/siva-purana/saturda-samhita/4/19

सुमुखो दुर्मुखश्चैव दुदर्भो दुरतिक्रमः ।। शिष्यैः साहाय्यं व्यासस्य करिष्येऽहं तदा विधे ।। १९ ।।

sanskrit

They are Sumukha, Durmukha, Durdarbha and Duratikrama. O Brahmā, I shall then render help to Vyāsa through the disciples.

english translation

sumukho durmukhazcaiva dudarbho duratikramaH || ziSyaiH sAhAyyaM vyAsasya kariSye'haM tadA vidhe || 19 ||

hk transliteration by Sanscript