Mahabharata 5.194.18

यथा भीष्मः शांतनवो मासेनेति मतिर्ममएषा मे परमा शक्तिरेतन्मे परमं बलम्

yathā bhīṣmaḥ śāṃtanavo māseneti matirmamaeṣā me paramā śaktiretanme paramaṃ balam

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