O my sons, go and find out about Joseph and his brother (12:87)

﴿يَا بَنِيَّ اذْهَبُوا فَتَحَسَّسُوا مِن يُوسُفَ وَأَخِيهِ وَلَا تَيْأَسُوا مِن رَّوْحِ اللَّهِ ۖ إِنَّهُ لَا يَيْأَسُ مِن رَّوْحِ اللَّهِ إِلَّا الْقَوْمُ الْكَافِرُونَ﴾
[ يوسف: 87]

12:87 O my sons, go and find out about Joseph and his brother and despair not of relief from Allah. Indeed, no one despairs of relief from Allah except the disbelieving people."

Their father told them to go and find out news about Joseph and his brother, and not to despair of relief from Allah and His release of His servants.
Without doubt, only disbelieving people despair of relief from Allah and His release of His servants, because they do not know the greatness of Allah’s power and His subtle favour upon His servants.

"O my sons! Go you and enquire about Yusuf (Joseph) and his brother, and never give up hope of Allah's Mercy. Certainly no one despairs of Allah's Mercy, except the people who disbelieve."

phonetic Transliteration

Ya baniyya ithhaboo fatahassasoo min yoosufa waakheehi wala tayasoo min rawhi Allahi innahu la yayasu min rawhi Allahi illa alqawmu alkafiroona

Abdullah Yusuf Ali - Translation

"O my sons! go ye and enquire about Joseph and his brother, and never give up hope of Allah's Soothing Mercy: truly no one despairs of Allah's Soothing Mercy, except those who have no faith."

Safi-ur-Rahman al-Mubarakpuri

"O my sons! Go you and inquire about Yusuf and his brother, and never give up hope of Allah's mercy. Certainly no one despairs of Allah's mercy, except the people who disbelieve."

Page 246 English transliteration