Hadithcore
Mishkat al-Masabih, 3151

He reported God's Messenger as saying, "Every important matter which is not begun by an expression of praise to God is maimed.” Ibn Majah transmitted it.

وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «كُلُّ أَمْرٍ ذِي بَالٍ لَا يُبْدَأُ فِيهِ بِالْحَمْدِ لِلَّهِ فَهُوَ أَقْطَعُ» . رَوَاهُ ابْنُ مَاجَهْ

References1 variant
In-Book Reference
Book 13, Hadith 71