It was narrated from Abu Hurairah that the Messenger of Allah (ﷺ) said:
"Whoever catches up with a Rak'ah of the prayer, then he has caught up with the prayer." (JA)
English reference (JA): Vol. 1, Book 6, Hadith 554 (JA)
Arabic reference (JA): Book 6, Hadith 558 (JA)