Manusmriti

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यादृशोऽस्य भवेदात्मा यादृशं च चिकीर्षितम् । यथा चौपचरेदेनं तथाऽत्मानं निवेदयेत् ॥ २५४ ॥

sanskrit

As his character is, as the work is which he desires to perform, and as the manner is in which he means to serve, even so (a voluntary slave) must offer himself.

english translation

yAdRzo'sya bhavedAtmA yAdRzaM ca cikIrSitam | yathA caupacaredenaM tathA'tmAnaM nivedayet || 254 ||

hk transliteration by Sanscript