"If I live- if Allah wills - I will forbid the names Rabah(profit), Najih(saved), Aflah (Successful), Nafi (beneficial) and Yasar(prosperity)."  

قَالَ رَسُولُ اللَّهِ ﷺ لَئِنْ عِشْتُ إِنْ شَاءَ اللَّهُ لأَنْهَيَنَّ أَنْ يُسَمَّى رَبَاحٌ وَنَجِيحٌ وَأَفْلَحُ وَنَافِعٌ وَيَسَارٌ  

"The Messenger of Allah ﷺ forbade giving our slaves four names: Aflah (successful), Nafi' (beneficial), Rabah (profit) and Yasar(prosperity)."  

نَهَى رَسُولُ اللَّهِ ﷺ أَنْ نُسَمِّيَ رَقِيقَنَا أَرْبَعَةَ أَسْمَاءٍ أَفْلَحُ وَنَافِعٌ وَرَبَاحٌ وَيَسَارٌ  

"I met 'Umar bin Khattab and he said: 'Who are you?' I said: 'Masruq bin Adja'.' 'Umar said: 'I heard the Messenger of Allah ﷺ saying,"Ajda' is a devil."  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ الأَجْدَعُ شَيْطَانٌ