Translation of the verse 89 from Surah Az-Zukhruf : Number of verses 89 - - page 495 - Part 25.
So turn away from them (O Muhammad SAW), and say: Salam (peace)! But they will come to know.
So turn aside from them and say, "Peace." But they are going to know.
(43:89) Indulge them, (O Prophet), and say to them: 'Peace to you.' *71 For soon they shall come to know.
*71) That is, "You should neither curse them for their scornful words and attitude of mockery and derision, nor respond with harsh words: just wish them well and take your leave."
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Source : Az-Zukhruf Verse 89: So turn aside from them and say, "Peace." But they are going to know.