Valmiki Ramayana Bala Kanda Sarga 37 Shloka 28

तत: then, कृत्तिकानाम् of Krittikas, अनुत्तमम् very best, क्षीरम् milk, प्रादुर्भूतम् formed, षण्णाम् of six of them, स्तनजम् coming from their breasts, पय: milk, षडानन: six faces Skanda, भूत्वा having assumed, जग्राह received.

Then excellent milk surged in the breasts of krittikas. Assuming six mouths, he sucked the milk.