this commentary was written "for the benefit of [my] son[s]", which can either refer to གཉན་ཕུལ་བྱུང་བ། as Sa chen's "spiritual son", or to his biological sons, སློབ་དཔོན་བསོད་ནམས་རྩེ་མོ། (1142–1182) and རྗེ་བཙུན་གྲགས་པ་རྒྱལ་མཚན། (1147–1216) Stearns 2001 (pp. 22f.)