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:18:44 –

There the authority is ˹completely˺ for Allah, the Truth. He is best in reward and best in outcome.  

There, that is, ˹on˺ the Day of Resurrection, ˹all˺ protection (walāya; if read wilāya, then ˹it means˺ ‘sovereignty’) belongs to God, the True (if read as al-haqqu then it is as an adjective qualifying walāya ˹or wilāya˺, or ˹if˺ read as al-haqqi, then it is an attribute of ˹God’s˺ Majesty). He is better at rewarding, than the rewarding of any ˹person˺ other than Him, if such ˹a person˺ were ˹in a position to˺ reward; and best in consequence (read ‘uquban or ‘uqban), ˹He is best˺ in terms of the consequence for believers (both ˹thawāban, ‘rewarding’, and ‘uqban, ‘consequence’˺ are in the accusative for ˹the purpose of˺ specification).
القرآن:١٨:٤٤ –

هُنَالِكَ الْوَلَايَةُ لِلَّهِ الْحَقِّ ۚ هُوَ خَيْرٌ ثَوَابًا وَخَيْرٌ عُقْبًا  

{هنالك} أي يوم القيامة {الولاية} بفتح الواو النصرة وبكسرها الملك {لله الحق} بالرفع صفة الولاية وبالجر صفة الجلالة {هو خير ثوابا} من ثواب غيره لو كان يثيب {وخير عقبا} بضم القاف وسكونها عاقبة للمؤمنين ونصبهما على التمييز.