(Al-Kahf) 18 : 103
قُلْ هَلْ نُنَبِّئُكُمْ بِالْأَخْسَرِينَ أَعْمَالًا

You ask: “Shall we inform you of the greatest losers in deeds?”

In this verse ‘we’ is used instead of “I”. That means the Messenger and believers are talking for the sake of the Lord. As one of 10 Crucial Signs of Doomsday, a Beast from the earth will come forth and will say mankind: “You all are uncertain of Our verses” as told in verse 27: 82. Here the Beast is talking “our verses” instead of “Lord’s verses” as it is taking for the sake of Lord.