Mahabharata 12.192.122
अमृताच्चामृतं प्राप्तः शीतीभूतो निरात्मवान्ब्रह्मभूतः स निर्द्वंद्वः सुखी शान्तो निरामयः
amṛtāccāmṛtaṃ prāptaḥ śītībhūto nirātmavānbrahmabhūtaḥ sa nirdvaṃdvaḥ sukhī śānto nirāmayaḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book