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:2:147 –

The truth is from your Lord, so never be among the doubters.  

The truth comes from your Lord; then be not among the doubters, who doubt it, that is to say, ‘˹be not˺ of such a disposition’, which is more eloquent than merely saying, ‘do not waver’.
القرآن:٢:١٤٧ –

الْحَقُّ مِنْ رَبِّكَ ۖ فَلَا تَكُونَنَّ مِنَ الْمُمْتَرِينَ  

{الحق} كائنا {من ربك فلا تكوننَّ من الممترين} الشاكين فيه أي من هذا النوع فهو أبلغ من أن لا تمتر.

See similar narrations below:

Collected by Qurʾān
quran:3:60 –

The truth is from your Lord, so do not be among the doubters.  

The truth is from your Lord (al-haqqu min rabbik, the predicate of a missing subject, which is ˹implied to be˺ amr ‘Īsā ˹‘the matter concerning Jesus’˺); be not of those who waver, those who are uncertain about it.
القرآن:٣:٦٠ –

الْحَقُّ مِنْ رَبِّكَ فَلَا تَكُنْ مِنَ الْمُمْتَرِينَ  

{الحق من ربك} خبر مبتدأ محذوف أي أمر عيسى {فلا تكن من الممترين} الشاكين.