Muhammad said: You say, "Asamtu mashiyati fasamat" (I have put my livestock to pasture and it has grazed), meaning: I have pastured them, so they have grazed.
قَالَ محمدٌ: تَقُولُ: أَسَمْتُ مَاشِيَتِي فسامت؛ أَي: رعيتها فرعت.