Narrated 'Ali (RA):

The dowry should not be less than ten Dirhams. [ad-Daraqutni reported it as Mawquf (saying of a Companion, i.e. 'Ali). Also, its chain of narrators is questionable].

وَعَنْ عَلَيٍّ ‏- رضى الله عنه ‏- قَالَ : { لَا يَكُونُ اَلْمَهْرُ أَقَلَّ مِنْ عَشَرَةِ دَرَاهِمَ } .‏ أَخْرَجَهُ اَلدَّارَقُطْنِيُّ مَوْقُوفًا , وَفِي سَنَدِهِ مَقَالٌ [1]‏ .‏