[Machine] "Do not say that, for the Messenger of Allah ﷺ forbade us from doing so and commanded us to say 'May Allah bless you and grant you blessings'."  

لَا تَقُولُوا ذَلِكَ إِنَّ رَسُولَ اللَّهِ ﷺ نَهَانَا عَنْ ذَلِكَ وَأَمَرَنَا أَنْ نَقُولَ «بَارَكَ اللَّهُ لَكَ وَبَارَكَ عَلَيْكَ»  

When the Prophet ﷺ congratulated a man on his marriage, he said: May Allah bless for you, and may He bless on you, and combine both of you in good (works). (Using translation from Abū Dāʾūd 2130)   

عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ إِذَا رَفَّأَ لِإِنْسَانٍ قَالَ «بَارَكَ اللَّهُ لَكَ وَبَارَكَ عَلَيْكَ وَجَمَعَ بَيْنَكُمَا فِي خَيْرٍ»