﴿ قَالُوا۟ يَٰٓأَبَانَا مَا لَكَ لَا تَأْمَ۫نَّا عَلَىٰ يُوسُفَ وَإِنَّا لَهُۥ لَنَٰصِحُونَ ﴾

“[On this they agreed; and thereupon] they spoke [thus to their father]: "O our father! Wherefore wilt thou not trust us with Joseph, seeing that we are indeed his well-wishers?”

Please check ayah 12:12 for complete tafsir.