Mahabharata 3.219.42

ये च मातृगणाः प्रोक्ताः पुरुषाश्चैव ये ग्रहाःसर्वे स्कन्दग्रहा नाम ज्ञेया नित्यं शरीरिभिः

ye ca mātṛgaṇāḥ proktāḥ puruṣāścaiva ye grahāḥsarve skandagrahā nāma jñeyā nityaṃ śarīribhiḥ

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