Arabic (Original)
حَدَّثَنَا إِسْحَاقُ حَدَّثَنِي أَبُو عَوَانَةَ عَنْ عُمَرَ بْنِ أَبِي سَلَمَةَ عَنْ أَبِيهِ عَنْ أَبِي هُرَيْرَةَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا تَمَنَّى أَحَدُكُمْ فَلْيَنْظُرْ مَا يَتَمَنَّى فَإِنَّهُ لَا يَدْرِي مَا يُكْتَبُ لَهُ مِنْ أُمْنِيَّتِهِ.
English Translation
The Messenger of Allah (peace be upon him) said: "When one of you wishes for something, let him consider what he is wishing for, because he does not know what will be written for him from his wish."