Bhagavatapurana 9.3.33

9.3.33

kālo 'bhiyātastriṇava caturyugavikalpitaḥ /
tadgaccha devadevāṃśo baladevo mahābalaḥ //

33. & 34. "Time calculated to be twenty-seven times the four yugas put together has elapsed; so get thee gone; there is now Balarama of great strength, an amsa of Hari; O king, on that foremost man bestow this jewel of thy daughter.