Quran 2:104

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ لَا تَقُولُواْ رَٲعِنَا وَقُولُواْ ٱنظُرۡنَا وَٱسۡمَعُواْ‌ۗ وَلِلۡڪَـٰفِرِينَ عَذَابٌ أَلِيمٌ۬ ١٠٤

O you who believe, do not say, "Raa`ena" (be our shepherd). Instead, you should say, "Unzurna" (watch over us), and listen. The disbelievers have incurred a painful retribution.