Tariq ut-tahqiq is one of the books attributed to Sanai. It is an Early New Persian mystical poetry book from 1133 in mathnawi form. This book was published in Persian by Mohammad Taghi Modarres Razavi as Masnavi of Sanai in 1969 with association of the University of Tehran Press.
For example, a poem called Litany from this book translated to english as follows: