Having tried every means and put forth great efforts they have (at last) given birth to this one single son, Jantu. What greater grief can there be than this!
एकः कथंचिदुत्पन्नः पुत्रो जन्तुरयं मम। यतमानासु सर्वासु किं नु दुःखमतः परम्॥