Surah Ash-Shu'ara 26:31

قَالَ فَأْتِ بِهِۦٓ إِن كُنتَ مِنَ ٱلصَّـٰدِقِينَ

[Pharaoh] said, "Then bring it, if you should be of the truthful."

Translation: Saheeh International

Tafsir

He Pharaoh said to him ‘Then bring it if you are truthful’ in this.

Excerpt from Tafsir al-Jalalayn, commentary on 26:31, via Quran.com. The reader has the full commentary and 9 more tafsirs.