Foremost Path To Buddhahood

都摄六根，
净念相继，
得三摩地，
斯为第一。

To gather in the six [sense] roots,
with pure [Buddha] mindfulness
in continuous succession,
to attain samādhi,
this is the foremost method [to Buddhahood].

– 楞严经大势至菩萨念佛圆通章
Śūraṅgama Sūtra’s Section
On Mahāsthāmaprāpta Bodhisattva’s
Perfect Penetration With Mindfulness Of Buddha

Related Article:
A Great Bodhisattva’s Buddha Mindfulness Practice
https://thedailyenlightenment.com/2013/12/a-great-bodhisattvas-buddha-mindfulness-practice