﴿ يَٰبَنِىَّ ٱذْهَبُوا۟ فَتَحَسَّسُوا۟ مِن يُوسُفَ وَأَخِيهِ وَلَا تَا۟يْـَٔسُوا۟ مِن رَّوْحِ ٱللَّهِ ۖ إِنَّهُۥ لَا يَا۟يْـَٔسُ مِن رَّوْحِ ٱللَّهِ إِلَّا ٱلْقَوْمُ ٱلْكَٰفِرُونَ ﴾

“[Hence,] O my sons, go forth and try to obtain some tidings of Joseph and his brother; and do not lose hope of God's life-giving mercy: verily, none but people who deny the truth can ever lose hope of God's life-giving mercy.”

Please check ayah 12:88 for complete tafsir.