353. Narrated Aboo Huraira (radhi Allaahu anhu) : Allaah’s Messenger (Sallallaahu Alaihi Wasallam) said,
Whoever could get or was able to offer one Rak’a of a Salaat (prayer), (in its proper time) he has got that Salaat.
[Saheeh Al-Bukhaari, Hadeeth No. 554, Vol. 1]
Source : The Book of Mosques and places of worship – Chapter 3o – Whosoever did (or got) one Rak’a of a Salaat (prayer) (in time) then he has got that Salaat. Al-Lulu Wal-Marjan, Compiled by : Fuwad Abdul-Baqi, Translated by : Dr. Muhammad Muhsin Khan
Read – Times of the Five Obligatory Daily Prayers – alifta.net