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:15:55 –

They said, "We have given you good tidings in truth, so do not be of the despairing."  

They said, ‘We give you good tidings in truth, sincerely; so do not be of the despairing’, the despondent.
القرآن:١٥:٥٥ –

قَالُوا بَشَّرْنَاكَ بِالْحَقِّ فَلَا تَكُنْ مِنَ الْقَانِطِينَ  

{قالوا بشرناك بالحق} بالصدق {فلا تكن من القانطين} الآيسين.