مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 1148
Prayer
The manner in which one who is led in prayer by an Imam must follow him, and the rule applying to the one who is preceded by him - Section 3
وَعَن أبي هُرَيْرَة أَنَّهُ كَانَ يَقُولُ: «مَنْ أَدْرَكَ الرَّكْعَةَ فَقَدْ أَدْرَكَ السَّجْدَةَ وَمَنْ فَاتَتْهُ قِرَاءَةُ أُمِّ الْقُرْآنِ فقد فَاتَهُ خير كثير» . رَوَاهُ مَالك
Abu Huraira used to say: If one is in time for the rak'a he is credited with the sajda, but if one misses the recitation of Umm al- Qur'an (Al-Qur’an; 1) a great amount of good has passed him by. Malik transmitted it.
Mishkat al-Masabih, 1148ضَعِيف (الألباني)