﴿ وَقَالُوا۟ لَوْلَآ أُنزِلَ عَلَيْهِ ءَايَٰتٌۭ مِّن رَّبِّهِۦ ۖ قُلْ إِنَّمَا ٱلْءَايَٰتُ عِندَ ٱللَّهِ وَإِنَّمَآ أَنَا۠ نَذِيرٌۭ مُّبِينٌ ﴾

“And yet they say, “Why have no miraculous signs ever been bestowed upon him from on high by his Sustainer?” Say: “Miracles are in the power of God alone; and as for me - I am but a plain warner.””

Please check ayah 29:52 for complete tafsir.