dakārādi śrī datta sahasranāma stotram

A thousand names of Dattātreya composed by Vāsudevānanda Sarasvatī under a single constraint: every one of them begins with the letter da. The restriction is the work. It opens on Dattātreya, Dayāpūrṇa, Datta, Dattābhaya and Dattadhairya, and then has to reach the whole god through that one door — the compassion words (Dayākara, Dayāmūla, Dayāsindhu, Dayodaya), the conch words, the cave words for the ascetic who lives in them, the Darpaka names in which he masters desire, the lotus-petal names that carry the yogic centres, and a long stretch on darkness and disease driven off. It runs to a hundred and fifty-nine verses and signs itself in the last line, where Vāsudeva stands praising with staff in hand. The closing verse promises the state of highest bliss to whoever recites it or merely hears it.