Yaqub (AS) grieved deeply for Yusuf and complained of his grief only to Allah.
وَتَوَلَّىٰ عَنۡهُمۡ وَقَالَ يَٰٓأَسَفَىٰ عَلَىٰ يُوسُفَ وَٱبۡيَضَّتۡ عَيۡنَاهُ مِنَ ٱلۡحُزۡنِ فَهُوَ كَظِيمࣱ ٨٤ قَالُواْ تَٱللَّهِ تَفۡتَؤُاْ تَذۡكُرُ يُوسُفَ حَتَّىٰ تَكُونَ حَرَضًا أَوۡ تَكُونَ مِنَ ٱلۡهَٰلِكِينَ ٨٥ قَالَ إِنَّمَآ أَشۡكُواْ بَثِّي وَحُزۡنِيٓ إِلَى ٱللَّهِ وَأَعۡلَمُ مِنَ ٱللَّهِ مَا لَا تَعۡلَمُونَ ٨٦
84 And he turned away from them and said, "Oh, my sorrow over Joseph," and his eyes became white from grief, for he was [of that] a suppressor 85 They said, "By Allah, you will not cease remembering Joseph until you become fatally ill or become of those who perish 86 He said, "I only complain of my suffering and my grief to Allah, and I know from Allah that which you do not know