A man who mixes barley with wheat and then sells it

Sulayman bin Musa says that the Messenger of Allah (peace and blessings be upon him) saw a man selling food mixed with barley. He said to him: "Separate this from this and this from this, then sell this however you wish and sell that however you wish, for indeed there is no adulteration in our religion."

Sayyiduna Ibn Abbas (may Allah be pleased with them both) was asked: A man mixes barley into wheat and then sells it; how is this? He said: There is no harm in it.

Al-Sha'bi was asked about this, and he considered it disliked.

Muhammad used to consider it disliked for a man to mix good-quality and inferior grain together and sell it. However, if the quality of the two is close to one another, there is no harm in it.

Hammad was asked: if a person mixes wheat with barley, or mixes wheat with an inferior grade of wheat, and sells it, what is the ruling? He considered it disliked.