Bhagavatapurana 9.10.5.p1

9.10.5.p1

yo lokavīrasamitau dhanuraiśamugraṃ $ sītāsvayaṃvaragṛhe triśatopanītam &

6. In the midst of all the warriors that had assembled at the court arranged for the Svayamvara of Sita, he (Rama), like a sportful young elephant that breaks a stick of sugarcane, lifted the formidable Siva-given bow brought therein by three hundred men, strung it, drew it and broke it, O king, in the middle.