Ibn-e-Majah 1385 – Waseela In Prayer Of A Blind Person Taught By Prophet (Sws)
It is fine to ask someone to pray for himself. The prophet prayed for the man. This is what he was referring to, that he was praying through prophet. It has nothing to do with the concept of waseela found in some circles of the Muslims. There is no such thing in Deen. We are told to pray straight to God. Mention of someone doesn’t add any thing to Dua which may persuade God more. God listens to every prayer and answer it on merit.