Ta-Ha - 20:44

فَقُولَا لَهُ قَوْلًا لَّيِّنًا لَّعَلَّهُ يَتَذَكَّرُ أَوْ يَخْشَى
[20:44]
Then speak to him a gentle word haply he may mind or fear.
"But speak to him mildly; perchance he may take warning or fear (Allah)."
And speak unto him a gentle word, that peradventure he may heed or fear.