Bulugh al-Maram 7 Business Transactions كتاب البيوع 52

وَعَنِ اِبْنِ مَسْعُودٍ – رضى الله عنه – قَالَ: قَالَ رَسُولُ اَللَّهِ – صلى الله عليه وسلم -{ لَا تَشْتَرُوا اَلسَّمَكَ فِي اَلْمَاءِ; فَإِنَّهُ غَرَرٌ } رَوَاهُ أَحْمَدُ, وَأَشَارَ إِلَى أَنَّ اَلصَّوَابَ وَقْفُهُ 1 . 1 – ضعيف. رواه أحمد ( 3676 ).

Narrated Ibn Mas’ud (RA): Allah’s Messenger (صلى الله عليه وسلم) said: “Do not buy the fish that is in the water, for it involves uncertainty (risk).” [Reported by Ahmad who indicated that the correct view is that it is Mawquf (saying of a Companion, i.e. Ibn Mas’ud].