فَقُلۡنَا ٱضۡرِبُوهُ بِبَعۡضِهَاۚ كَذَٰلِكَ يُحۡيِ ٱللَّهُ ٱلۡمَوۡتَىٰ وَيُرِيكُمۡ ءَايَٰتِهِۦ لَعَلَّكُمۡ تَعۡقِلُونَ ٧٣
So We said, "Strike him [i.e., the slain man] with part of it."1 Thus does Allāh bring the dead to life, and He shows you His signs that you might reason.
Translation: Saheeh International (English)
1 i.e., the cow. Thereupon, Allāh restored life to the man, who informed them of his murderer.
Each word's meaning and sound
Allah told them to hit the murdered man with a piece of the cow which they had been told to sacrifice. He would then bring him to life to tell them who the murderer was. They did this and he told them who had killed him. As this man was brought back to life by Allah, so will He bring the dead back to life on the Day of Judgement. Allah gives humanity clear signs of His power, to make them reflect and understand, and have true faith in Him.
Al-Mukhtasar in interpreting the Noble Quran