अतीशवागीश्वरकीर्त्योः तारामन्त्रस्य पुरश्चरणविशये कानिचन वाक्यानि

If one consults the Tantra of Tara the Yogini, the author says, it
would seem that little importance is attached to daily purity and so
on; but, according to the long-established tradition of Atisa, it is
best if the practitioner washes .the dwelling, the utensils, and himself with bathing water over which has been recited the “conquering” mantra, if he gives up meat and beer and so on while he is practising the ritual service, and if in short he keeps himself in a condition of bodily purity. He should avoid garlic and onions, which
pollute the strength of his speech, and beer and drugs, which produce drowsiness; he should avoid anything that might cause contamination or distraction, and he should wash himself again and
again with water over which the mantra has been recited. In this
connection, the text recommends the ritual of Bhavabhadra
for
the practitioner to cleanse away any lapses in his vows. And before
beginning the ritual, he should first determine by an examination
of omens ….

Finally, the handbook talks of the requisite number of recitations
in the ritual service, and our author quotes Candragomin: “Reciting
300,000 or 600,000 or 1,000,000 times, one accomplishes all functions.” And Vagisvarakirti said: “The count for the syllables of the
mantra is 100,000.” Thus the basic measure of ritual service is
100,000 recitations; but it is also held that in this “age of contention”
one should recite four times as much. Drubch’en rinpoch’e said:
“It is said that if one recites the 10-syllable mantra 10,000,000
times, one’s qualities will equal those of the noble Tara herself.”
That is to say, if one completes 10,000,000 recitations, one will have
the power to accomplish all functions and magical attainments. The
oral tradition ascribed to the Chenngawa, however, holds that if the
practitioner devotes himself to a ritual service of 100,000 recitations
he will be unharmed by any impediments; since she is a deity of
active function, it is quick and easy to succeed in her ritual service.
And since there is a great deal of evidence for this position in the
expanded commentaries upon the various histories of Tara, our
author concludes, we may place our belief therein.