Manusmriti

siva.sh/manusmriti/3/37

दश पूर्वान् परान् वंश्यानात्मानं चैकविंशकम् । ब्राह्मीपुत्रः सुकृतकृत्मोचयत्येनसः पितॄन् ॥ ३७ ॥

sanskrit

The son of a wife wedded according to the Brahma rite, if he performs meritorious acts, liberates from sin ten ancestors, ten descendants and himself as the twenty-first.

english translation

daza pUrvAn parAn vaMzyAnAtmAnaM caikaviMzakam | brAhmIputraH sukRtakRtmocayatyenasaH pitRRn || 37 ||

hk transliteration by Sanscript