With Queen Mallikā
King Pasenadi and Queen Mallikā are together in the royal longhouse when the king asks whether there is anyone she holds more dear than herself. She says there is not, and asks him the same question; he gives the same answer. The king goes to the Buddha and reports the conversation. The Buddha responds with a single verse: having searched every quarter with the mind, one finds no one dearer than oneself, and since everyone holds themselves dear, one who desires self-knowledge would harm no other. The same episode appears in Ud 5.1.
The full text
Linked Discourses 3.8 · 1. Shackles · With Queen Mallikā · translated by Bhikkhu Sujato · public domain (CC0) · about 1 min · on SuttaCentral
At Sāvatthī. Now at that time King Pasenadi of Kosala was upstairs in the royal longhouse together with Queen Mallikā. Then the king said to the queen, “Mallikā, is there anyone more dear to you than yourself?” “No, Great King, there isn’t. But is there anyone more dear to you than yourself?” “For me also, Mallikā, there’s no one.”
Explained: Each holds themselves dear
Then King Pasenadi of Kosala came downstairs from the stilt longhouse, went to the Buddha, bowed, sat down to one side, and told him what had happened.
Then, understanding this matter, on that occasion the Buddha spoke this verse:
“Having explored every quarter with the mind,one finds no one dearer than oneself.Likewise for others, each holds themselves dear;so one who desires self-knowledgewould harm no other.”