Mbh 14.61.1a

"Vaisampayana said, 'After the high-souled Vasudeva of great prowess had finished his narration of the great battle of the Bharatas before his sire, it was plain that that hero had passed over the slaughter of Abhimanyu. The motive of the high-souled one was that his sire might not hear what was highly unpleasant to him. Indeed, the intelligent Krishna did not wish that his sire Vasudeva should, on hearing the dreadful intelligence of the death of his daughter's son, be afflicted with sorrow and grief. (His sister) Subhadra, noticing that the slaughter of her son had not been mentioned, addressed her brother, saying,--"Do thou narrate the death of my son, O Krishna"--and fell down on the earth (in a swoon). Vasudeva beheld his daughter fallen on the ground. As soon as he saw this, he also fell down, deprived of his senses by grief. (Regaining his senses) Vasudeva, afflicted with grief at the death of his daughter's son, O king, addressed Krishna, saying, "O lotus-eyed one, thou art famed on Earth for being truthful in speech. Why, however, O slayer of foes, dost thou not tell me today of the death of my daughter's son? O puissant one, tell me in detail of the slaughter of thy sister's son. Possessed of eyes resembling thine, alas, how was he slain in battle by foes? Since my heart does not from grief break into a hundred pieces, it seems, O thou of the Vrishni's race, that it does not die with men when its hour does not come. Oh, at the time of his fall, what words did he utter, apostrophising his mother? O lotus-eyed one what did that darling of mine, possessed of restless eyes, say unto me? I hope he has not been slain by foes while retreating from battle with his back towards them? I hope, O Govinda, that, his face did not become cheerless while fighting? He was possessed, O Krishna, of mighty energy. From a spirit of boyishness, that puissant hero, boasting (of his prowess) in my presence, used to speak of his skill (in battle).