﴿ أَوْ خَلْقًۭا مِّمَّا يَكْبُرُ فِى صُدُورِكُمْ ۚ فَسَيَقُولُونَ مَن يُعِيدُنَا ۖ قُلِ ٱلَّذِى فَطَرَكُمْ أَوَّلَ مَرَّةٍۢ ۚ فَسَيُنْغِضُونَ إِلَيْكَ رُءُوسَهُمْ وَيَقُولُونَ مَتَىٰ هُوَ ۖ قُلْ عَسَىٰٓ أَن يَكُونَ قَرِيبًۭا ﴾

“or any [other] substance which, to your minds, appears yet farther removed [from life]!" And [if] thereupon they ask, "Who is it that will' bring us back [to life]?"-say thou: "He who has brought you into being in the first instance." And [if] thereupon they shake their heads at thee [in disbelief] and ask, "When shall this be?"-say thou: "It may well be soon,”

Please check ayah 17:52 for complete tafsir.