Hadith 500180
Chapter 1: The Times of Prayer - كتاب وقوت الصلاة
وَحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ أَبَا هُرَيْرَةَ، كَانَ يَقُولُ مَنْ أَدْرَكَ الرَّكْعَةَ فَقَدْ أَدْرَكَ السَّجْدَةَ وَمَنْ فَاتَهُ قِرَاءَةُ أُمِّ الْقُرْآنِ فَقَدْ فَاتَهُ خَيْرٌ كَثِيرٌ .
Yahya related to me from Malik that he had heard that Abu Hurayra used to say, "Whoever catches the ruku has caught the sajda and whoever misses the recitation of the umm al-Qur'an has missed much good."
Reference Muwatta Malik 500180