It is narrated from Sayyiduna Abu Ayyub (may Allah be pleased with him) that Nauf and Sayyiduna Abdullah bin Amr (may Allah be pleased with him) both gathered together. Nauf said: If the heavens, the earths, and all the creatures between them are placed on one side of a scale, and "La ilaha illallah" is placed on the other side, the latter side will outweigh the former. And if the heavens, the earth, and all the creatures between them are made into a layer of iron and "La ilaha illallah" is placed upon it, then this word will pierce through it and reach Allah Almighty.