Venerable Bhaddiya son of Kāḷīgodhā, even in the wilderness, at the foot of a tree, or in an empty dwelling, frequently expressed this heartfelt sentiment “Oh, what bliss! Oh, what bliss!”

At one time the Buddha was staying near Anupiya in a mango grove. Now at that time, Venerable Bhaddiya son of Kāḷīgodhā, even in the wilderness, at the foot of a tree, or in an empty dwelling, frequently expressed this heartfelt sentiment: “Oh, what bliss! Oh, what bliss!”Several bhikkhus heard him and thought, “Without a doubt, Venerable Bhaddiya leads the spiritual life dissatisfied. It’s when recalling the pleasures of royalty he formerly enjoyed as a lay person that, even in the wilderness, at the foot of a tree, or in an empty dwelling, he frequently expresses this heartfelt sentiment: ‘Oh, what bliss! Oh, what bliss!’”Then those bhikkhus went up to the Buddha, bowed, sat down to one side, and told him what was happening.So the Buddha addressed one of the monks, “Please, monk, in my name tell the bhikkhu Bhaddiya that the teacher summons him.”“Yes, sir,” that monk replied. He went to Bhaddiya and said to him, “Reverend Bhaddiya, the teacher summons you.” “Yes, reverend,” Bhaddiya replied. He went to the Buddha, bowed, and sat down to one side. The Buddha said to him:“Is it really true, Bhaddiya, that even in the wilderness, at the foot of a tree, or in an empty dwelling, you frequently express this heartfelt sentiment: ‘Oh, what bliss! Oh, what bliss!’?” “Yes, sir.”“But why do you say this?” “Formerly, as a lay person ruling the land, my guard was well organized within and without the royal compound, within and without the city, and within and without the country. But although I was guarded and defended in this way, I remained fearful, scared, suspicious, and nervous. But these days, even when alone in the wilderness, at the foot of a tree, or in an empty dwelling, I’m not fearful, scared, suspicious, or nervous. I live relaxed, unruffled, surviving on charity, my heart free as a wild deer. It is for this reason that, even in the wilderness, at the foot of a tree, or in an empty dwelling, I frequently expressed this heartfelt sentiment: ‘Oh, what bliss! Oh, what bliss!’”Then, understanding this matter, on that occasion the Buddha expressed this heartfelt sentiment:“They who hide no anger within,gone beyond any kind of existence;happy, free from fear and sorrow—even the gods can’t see them.”The Buddha's words/Bhaddiyasutta Ud 2.10