Therefore, O twice-born, I have taught you exactly as I knew it; this knowledge must never be given to the envious, nor to one addicted to disparaging others.
Verse 3 — BPHS Maha Purusha Blessings & Closing Benediction
This should never be given to the dull-witted, the ill-conducted, or the ignorant; it is to be given only to one of divine nature, devout, and truthful.