What is the hadith that is hasan gharib?

The 'Hasan' (good) Hadith is one whose narrators are known for truthfulness and trustworthiness, but they possess less memorization and precision than the narrators of a 'Sahih' (authentic) Hadith, while being free from anomalousness (shudhudh), peculiarity (nakarah), and defects ('illah). As for the 'Gharib' (unfamiliar/singular) Hadith, it is one where certain narrators are unique in its text (matn) or chain of transmission (isnad). When a Hadith is described as 'Hasan Gharib,' it means that it has met the conditions of a Hasan Hadith while also possessing a singularity. An example of this is the Hadith narrated by Aisha (may Allah be pleased with her) in Sunan al-Tirmidhi: "When the Prophet (peace and blessings of Allah be upon him) exited the lavatory, he would say: 'Ghufranak' (Your forgiveness)." Al-Tirmidhi described it as Hasan Gharib because it is only known through the narration of Isra'il from Yusuf bin Abi Burdah.