Mahabharata 13.27.49

उपासते यथा बाला मातरं क्षुधयार्दिताःश्रेयस्कामास्तथा गङ्गामुपासन्तीह देहिनः

upāsate yathā bālā mātaraṃ kṣudhayārditāḥśreyaskāmāstathā gaṅgāmupāsantīha dehinaḥ

Our plain-language meaning of this verse is waiting for scholar review.