Ramayana
तं प्रयान्तं समुद्वीक्ष्य सुरसा वाक्यमब्रवीत् । बलं जिज्ञासमाना वै नागमाता हनूमतः ॥ ५-१-१५८
Surasa, mother of serpents, observing that Hanuman was attempting to escape, said this in order to gauge his strength ॥ 5-1-158॥
english translation
taM prayAntaM samudvIkSya surasA vAkyamabravIt । balaM jijJAsamAnA vai nAgamAtA hanUmataH ॥ 5-1-158
hk transliteration by Sanscript