Hammaad Bin Zayd (rahimahullaah) said:

When Ayyoub As-Sakhtiyaani (rahimahullaah) used to congratulate a man for the birth of a child, he would say:

جَعَلَهُ اللهُ مُبَارَكًا عَلَيْكَ وَعَلَى أُمَّةِ مُحَمَّدٍ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ

May Allaah make him a blessing upon you and upon the Ummah of Muhammad (sallal-laahu-alayhi-wasallam).

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[Source:   الدعاء للطبراني] [945 ]