Truthfulness and honesty

وَسْـَٔلِ ٱلْقَرْيَةَ ٱلَّتِى كُنَّا فِيهَا وَٱلْعِيرَ ٱلَّتِىٓ أَقْبَلْنَا فِيهَا ۖ وَإِنَّا لَصَـٰدِقُونَ

And ask the city in which we were and the caravan in which we came - and indeed, we are truthful.'"

وَٱلْخَـٰمِسَةُ أَنَّ لَعْنَتَ ٱللَّهِ عَلَيْهِ إِن كَانَ مِنَ ٱلْكَـٰذِبِينَ

And the fifth [oath will be] that the curse of Allāh be upon him if he should be of the liars.