Food without Mentioning the Name of Allah

The Messenger of Allah (s) said:

«كُلُّ طَعامٍ لا يُذْكَرُ اِسْمُ اللّهِ عَلَيْهِ، فَاِنَّما هُوَ داءٌ وَ لا بَرَكَةَ فيهِ»

‘Every food on which the Name of Allah is not mentioned is (a cause of) disease and is devoid of barakah (blessing).’

Source: Kanz al-ʿUmmāl,15: 238