Surah Az-Zukhruf 43:89

فَٱصْفَحْ عَنْهُمْ وَقُلْ سَلَـٰمٌ ۚ فَسَوْفَ يَعْلَمُونَ

So turn aside from them and say, "Peace." But they are going to know.

Translation: Saheeh International

Tafsir

God exalted be He says Then disregard them leave them be and say ‘Peace!’ I will stay away from you — this was revealed before he was commanded to fight them. For they will soon come to know ya‘lamūna may also be read as second person plural ta‘lamūna ‘you will come to know’ meant to threaten them.

Excerpt from Tafsir al-Jalalayn, commentary on 43:89, via Quran.com. The reader has the full commentary and 9 more tafsirs.