Language:

Narrated `Ali:

I never heard Allah's Messenger (ﷺ) saying, "Let my father and mother be sacrificed for you," except for Sa`d (bin Abi Waqqas). I heard him saying, "Throw! (arrows), Let my father and mother be sacrificed for you !" (The sub-narrator added, "I think that was in the battle of Uhud.")

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ سُفْيَانَ، حَدَّثَنِي سَعْدُ بْنُ إِبْرَاهِيمَ، عَنْ عَبْدِ اللَّهِ بْنِ شَدَّادٍ، عَنْ عَلِيٍّ ـ رضى الله عنه ـ قَالَ مَا سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يُفَدِّي أَحَدًا غَيْرَ سَعْدٍ، سَمِعْتُهُ يَقُولُ ‏ "‏ ارْمِ فَدَاكَ أَبِي وَأُمِّي ‏"‏‏.‏ أَظُنُّهُ يَوْمَ أُحُدٍ‏.‏
Reference : Sahih al-Bukhari 6184
In-book reference : Book 78, Hadith 208
USC-MSA web (English) reference : Vol. 8, Book 73, Hadith 203
  (deprecated numbering scheme)