Tafsir of Sad 38:61

قالوا ربنا من قدم لنا هذا فزده عذابا ضعفا في النار

They will say: "Our Lord! Whoever brought this upon us, add to him a double torment in the Fire!''. This is like the Ayah,

قالت أخراهم ﻻولهم ربنا هوﻻء أضلونا فاتهم عذابا ضعفا من النار قال لكل ضعف ولكن ﻻ تعلمون

The last of them will say to the first of them: "Our Lord! These misled us, so give them a double torment of the Fire.'' He will say: "For each one there is double (torment), but you know not.'' (7:38) which means that each of them will be punished as he deserves. Allah tells:

وقالوا ما لنا ﻻ نرى رجاﻻ كنا نعدهم من اﻻشرار