Abdullah bin Babayh (may Allah have mercy on him) said that Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) used to carry a basket of manure to his land, and Sa'd (may Allah be pleased with him) said: A basket of manure is like a basket of wheat. Al-Asma'i (may Allah have mercy on him) said: Al-'urrah means human excrement. The opposite of this has been narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both), specifically concerning human excrement.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب المزارعة / 11754