Abu Huraira reported God’s Messenger as saying, “If anyone perseveres in praying the two rak'as of the forenoon, his sins will be forgiven him, even if they are like the foam of the sea.”
God’s Messenger used to pray in the forenoon so often that we felt he would never stop doing so; then he would leave off doing so for so long that we felt he would never resume prayer at that time.
Mu'adh b. Anas al-Juhani reported God’s Messenger as saying, “If anyone sits in his place of prayer when he finishes the Morning Prayer till he prays the two rak'as of the forenoon, saying nothing but what is good, his sins will be forgiven him even if they are more than the foam of the sea.”