Ka‘b, who said: “If one of you were to see the reward for two units of prayer, he would see something greater than the firmly rooted mountains.” The Prophet, peace and blessings be upon him, said: “The believer’s shade on the Day of Resurrection is his charity.” Thus, his dinar and dirham come to shade him; this is only the reward for them. Allah Most High said:

“Whoever comes with a good deed will have ten times its like.”
[al-An‘ām 160]

One of the greatest good deeds is for a man to say, “There is no deity worthy of worship but Allah.” If he says, “There is no deity worthy of worship but Allah,” is he then told on the Day of Resurrection, “There is no deity worthy of worship but Allah,” ten times? Rather, this refers only to the reward for saying it.

He said: We have never known the Arabs, in their natural way of speaking, to object to one man saying to another: