One should, O Yudhishthira, always fear these two, viz., Energy and Penances. Both these should be shirked or kept at a distance.
तेजसस्तपसश्चैव नित्यं बिभ्येद् युधिष्ठि। उभे चैते परित्याज्ये तेजश्चैव तपस्तथा॥