The works of Ādi Śaṅkarācārya

Nirguṇamānasapūjā

Verse 32

एवं वेदान्तकल्पोक्तस्वात्मलिङ्गप्रपूजनम् ।कुर्वन्नामरणं वाऽपि क्षणं वा सुसमाहितः ॥ ३२ ॥

In plain words

So: this full worship of the liṅga that is your own Self, the rite Vedānta itself lays down — carry it out with the mind wholly gathered, either every day until you die, or even for one single moment.

Close to the Sanskrit

Thus, performing the complete worship of the liṅga that is one's own Self, as declared in the ritual ordinance of Vedānta — whether until death, or even for a single moment — being well collected...