大般涅槃經義記 2.115

2.115

第七段中，「以水多故一切失」者，由加妄情失於世善名為失乳，失於賢聖所修道行名為失酪，不得涅槃名失醍醐，此等應得不得名失。

In the seventh section, "because there was much water, everything was lost" means that due to adding false sentiments, losing worldly goodness is called losing milk; losing the path of practice cultivated by the worthy and noble ones is called losing curds; and failing to attain nirvāṇa is called losing ghee: failing to attain these things that should be attained is called "loss."