Hadith: I never saw the Prophet (may Allah's peace and blessings be upon him) ask that his parents be sacrificed for anyone after Sa‘d. I heard him say: Shoot your arrow, may my mother and father be sacrificed for you

عن علي رضي الله عنه قال: ما رأيتُ النبيَّ صلى الله عليه وسلم يُفَدِّي رجلًا بعد سعد سمعتُه يقول: «ارم فداك أبي وأمي».
[صحيح] - [متفق عليه]

‘Alī (may Allah be pleased with him) reported: I never saw the Prophet (may Allah's peace and blessings be upon him) ask that his parents be sacrificed for anyone after Sa‘d. I heard him say: 'Shoot your arrow, may my mother and father be sacrificed for you.
Sahih/Authentic. - [Al-Bukhari and Muslim]

Explanation

‘Alī (may Allah be pleased with him) relates that he never saw the Prophet (may Allah's peace and blessings be upon him) ask that his parents be sacrificed for someone after Sa‘d ibn Abi Waqqās, insofar as he heard the Prophet (may Allah's peace and blessings be upon him) say to him during the battle of Uḥud: "Shoot the unbelievers with arrows, may my father and mother be sacrificed for you," i.e. I offer my parents as a sacrifice for you so that you remain unharmed. And it was confirmed in an authentic Hadīth that the Prophet (may Allah's peace and blessings be upon him) ask that his parents be sacrificed for Zubayr during the battle of the Trench. Both incidents can be settled under the possibility that ‘Alī (may Allah be pleased with him) was not aware of that, or that what he meant was in relation to the battle of Uhud only.