﴿ وَإِذَا سَمِعُوا۟ مَآ أُنزِلَ إِلَى ٱلرَّسُولِ تَرَىٰٓ أَعْيُنَهُمْ تَفِيضُ مِنَ ٱلدَّمْعِ مِمَّا عَرَفُوا۟ مِنَ ٱلْحَقِّ ۖ يَقُولُونَ رَبَّنَآ ءَامَنَّا فَٱكْتُبْنَا مَعَ ٱلشَّٰهِدِينَ ﴾

“For, when they come to understand what has been bestowed from on high upon this Apostle, thou canst see their eyes overflow with tears, because they recognize something of its truth; [and] they say: "O our Sustainer! We do believe; make us one, then, with all who bear witness to the truth.”

Please check ayah 5:86 for complete tafsir.