Prayer (Kitab Al-Salat): Detailed Rules of Law about the Prayer during Journey

Dawud :: Book 4 : Hadith 1282

Narrated Mu'adh ibn Anas al-Juhani:

The Prophet (peace_be_upon_him) said: If anyone sits in his place of prayer when he finishes the dawn prayer till he prays the two rak'ahs of the forenoon, saying nothing but what is good, his sins will be forgiven even if they are more than the foam of the sea.

Source materials are from the University of Southern California MSA site
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