Because he was in bliss, he did not need it. He ate once in several days.
Buddha tried to copy Prince Vardhamana. And became so weak, he could not even walk.
He barely pulled himself, sat under a tree, and almost collapsed.
Someone brought him a bowl of milk pudding. He drank, got a good nights' sleep, woke up at dawn.
The last star was dipping down the horizon.
He realized, there was nothing to look forward to now.
He just sat.
And freedom dawned on him.
It is said that the Buddha did not utter a word for seven days, after this totality.
NirvAna is that freedom.
And same is called Samadhi.
- Sri Sri Ravi Shankar