Mudgalapurana 4.6.141

4.6.141

tataḥ kṛṣṇaśca duḥkhārtaḥ sa dhyānenāvalokayan |
naravanna bubodhā'pi sa doṣo vasudevajaḥ ||

Then Kṛṣṇa, afflicted with grief, looking through meditation, / did not know, just like a mortal, the son of Vasudeva having that fault.