Although your son performs a servile office, yet he is not to blame: (the performance of) that alone which serves no purpose of his brother possessed of many perfections, could bring blame upon him.
जघन्यमपि ते पुत्रः कृतवान् न तु गर्हितः। भ्रातुर्यदर्थरहितं सर्वं तद् गर्हितं गुणैः॥