Surdas (IAST: Sūr, Devanagari: सूर) was a 16th-century blind Hindu devotional poet and singer, who was known for his lyrics written in praise of Krishna. They are usually written in Braj Bhasha, one of the two literary dialects of Hindi. The book Sur Sagar (Sur's Ocean) is traditionally attributed to Surdas. However, many of the poems in the book seem to be written by later poets in Sur's name. The Sur Sagar in its present form focuses on descriptions of Krishna as a lovable child, written from the gopis' perspective. Surdas was a great religious singer.