Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:77:43 –

˹Being told˺, "Eat and drink in satisfaction for what you used to do."  

‘Eat and drink in ˹full˺ enjoyment (hanī’an is a circumstantial qualifier, in other words, mutahanni’īna) for what you used to do’, in the way of obedience.
القرآن:٧٧:٤٣ –

كُلُوا وَاشْرَبُوا هَنِيئًا بِمَا كُنْتُمْ تَعْمَلُونَ  

{كلوا واشربوا هنيئا} حال، أي متهنئين {بما كنتم تعملون} من الطاعة.

See similar narrations below:

Collected by Qurʾān
quran:52:19 –

˹They will be told˺, "Eat and drink in satisfaction for what you used to do."  

And it will said to them: ‘Eat and drink in full enjoyment (hanī’an is a circumstantial qualifier, that is to say, muhanna’īna) ˹as a reward˺ for what (bi-mā: the bi- is causative) you used to do’.
القرآن:٥٢:١٩ –

كُلُوا وَاشْرَبُوا هَنِيئًا بِمَا كُنْتُمْ تَعْمَلُونَ  

{كلوا واشربوا هنيئا} حال أي: مهنئين {بما} الباء سببية {كنتم تعملون}.