These are Tilopa’s ‘six words of advice’ in their entirety. A thousand years old, jostled about in layers of translation and interpretation. Would’ve originally been six words, but it’s hard to pull that off in English. They are:

Don’t recall. 
Don’t imagine. 
Don’t think. 
Don’t examine. 
Don’t control. 
Rest.

This translation by Ken McLeod.

Although these words are the basis for various practices, you might want to further explore them as a poem in translation, a beautiful and simple thing. The linked document gives the Tibetan source (itself a translation from the original, now lost), a transliteration, and both of McLeod’s English translations.