Shiva Purana
शुश्रूषेतरवर्णानां धर्मः शूद्रस्य कथ्यते ॥ उद्यानकरणं चैव मम क्षेत्रसमाश्रयः ॥ १७ ॥
The duty of a Śūdra is service unto the persons of the other castes, making of parks and resorting to my holy centres.
english translation
zuzrUSetaravarNAnAM dharmaH zUdrasya kathyate ॥ udyAnakaraNaM caiva mama kSetrasamAzrayaH ॥ 17 ॥
hk transliteration by Sanscript