Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 3
Sanskrit:
स तदप्रियमाकर्ण्य शोकामर्षयुतो नृप ।अयादवीं महीं कर्तुं चक्रे परममुद्यमम् ॥ ३ ॥
ITRANS:
sa tad apriyam ākarṇyaśokāmarṣa-yuto nṛpaayādavīṁ mahīṁ kartuṁcakre paramam udyamam
Translation:
Hearing this odious news, O King, Jarāsandha was filled with sorrow and anger, and he began the greatest possible endeavor to rid the earth of the Yādavas.