A History of Ancient Sanskrit Literature, so far as it illustrates the Primitive Religion of the Brahmans c6.164

दृष्टः। गृஹेषु तु ब्रह्मचर्यं विहितं। तच गृஹोक्तमेव कुर्यान्न देशधर्ममिति सिद्धं॥