Quotes from Vimalakīrti Nirdesa Sutra,
“As such, Ratnakuta, bodhisattvas in accord with their forthright mind, they can initiate their practices;.....
In accord with pure dharma preaching, their wisdom will be pure;
In accord with pure wisdom, their mind will be pure;
In accord with the pure mind, their entire stock of merits will be pure.
Accordingly, Ratnakuṭa, bodhisattvas who wish to attain the pure land should purify their mind. Their Buddha Land will also be pure in accord with this pure mind.”