As is in Shri Sai Satcharita, by Hemadpant .. Chapter II Page 7

Om Sai Shri Sai Jaya Jaya Sai

He pleaded for my cause and said to Sai Baba, "This Annasaheb wishes to write Your biography, don't say that You are a poor begging Fakir, and there is no necessity to write it, but if You agree and help him, he will write or rather, Your feet (grace) will accomplish the work.  

Bow to Shri Sai - Peace be to all