It is mentioned on the authority of Anas Bin Malik (May Allah be pleased with him) that when the Holy Prophet (SAW) sighted the moon of Rajab, he used to pray to Allah in the following words,
‘Allahuma Barik lana fi Rajaba wa Sha’bana wa ballighna Ramadhan’
“O Allah, make the months of Rajab and Sha’ban blessed for us, and let us reach the month of Ramadan (i.e. prolong our life up to Ramadan, so that we may benefit from its merits and blessings).”