Skandapurana 6.3.228.13

6.3.228.13

pitrarthaṃ ca pitṛvyasya māturmātāmahasya ca .
mātulasya tathā bhrātuḥ śvaśurasya sutasya ca .. 228.13 ..

On behalf of a father, a paternal uncle, a mother, a maternal grandfather, / a maternal uncle, a brother, a father-in-law, or a son;