Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 19

Sanskrit:

तं सङ्गय यथान्यायं गामर्घ्यं च न्यवेदयन् ।तेषां ये तत्प्रभावज्ञा: प्रणेमु: शिरसा बलम् ॥ १९ ॥

ITRANS:

taṁ saṅgamya yathā-nyāyaṁgām arghyaṁ ca nyavedayanteṣāṁ ye tat-prabhāva-jñāḥpraṇemuḥ śirasā balam

Translation:

They approached Lord Balarāma and worshiped Him with gifts of cows and arghya, as was fitting. Those among the Kurus who understood His true power bowed down to Him, touching their heads to the ground.

Purport:

The ācāryas explain that even the elders, like Bhīṣmadeva, also bowed down to Lord Baladeva.