What is expected foremost is not the flesh or blood that flows after slaughter. The most important thing that Allah expects from the Qurban service is our piety and sincerity.
Allah Ta'ala said,
لَنْ يَنَالَ اللَّهَ لُحُومُهَا وَلَا دِمَاؤُهَا وَلَكِنْ يَنَالُهُ التَّقْوَى مِنْكُمْ
"Camel flesh and blood can never reach (the pleasure) of Allah, but your piety can achieve it." (Surah Al Hajj: 37)
Shaykh As Sa'di said regarding the above verse, "Remember, what Allah hopes is not the flesh and blood of the sacrifice, because Allah does not need everything and He is the one who deserves to be exalted. What Allah expects from this sacrifice is sincerity, ihtisab (always expecting a reward from Him) and sincere intentions. Therefore, Allah said (which means), "It is your faith that can reach His pleasure". This should be the motivation when someone makes a sacrifice, namely sincerity, not riya 'or being proud of their assets, and not running it because it has become an annual routine. This is what must be present in other worship. Do not let our practice show only skin with no visible contents or visible bodies without souls.
Have we performed this sacrificial service to gain piety? Maybe our intention is not right because we want to show off our wealth with the amount of sacrifice that was slaughtered? Be careful with unwilling intentions.
The ugliness of non-sincere practices is explained in the following hadith.
عن محمود بن لبيد أن رسول الله -صلى الله عليه وسلم- قال «إن أخوف ما أخاف عليكم الشرك الأصغر». قالوا وما الشرك الأصغر يا رسول الله قال «الرياء يقول الله عز وجل لهم يوم القيامة إذا جزى الناس بأعمالهم اذهبوا إلى الذين كنتم تراءون فى الدنيا فانظروا هل تجدون عندهم جزاء»
From Mahmud bin Labid, the Messenger of Allah -peace and prayer of Allah be upon him- said, "Indeed, what I fear most will happen to you is Shirk Ashgor." The companions asked, "What is Shirk Ashgor, O Messenger of Allah?" He said, "(Shirk ashgor is) riya '. Allah Ta'ala said to those who do riya 'on the Day of Resurrection when people get rewarded for their deeds:' Go on to the person you are addressing riya deeds' in the world. Then see if you get a reply from them? ' (HR. Ahmad 5: 429. Shaykh Syu'aib Al Arnauth said that this hadith sanad is authentic).
Only Allah gives taufik.