The Messenger of Allah said: "Whoever catches one Rak'ah of the 'Asr before the sun sets, then he has caught it, and whoever catches one Rak'ah of the Subh before the sun rises, then he has caught it."
Sunan Ibn Majah Book 2, Hadith 33
← Previous Hadith "They mentioned negligence because of sleeping too much, and he said: 'They slept until the sun had risen. The Messenger of Allah said: "There is no negligence when oneis sleeping, rather there is negligence when one is awake. If anyone of you forgets to pray, or sleeps and misses a prayer, then let him pray when he remembers, and during its time if it is a day after. (Sahih)'Abdullah bin Rabah said: "Imran bin Husain heard me when I was narrating this Hadith and said: 'O young man, look at how you are narrating the Hadith. I was present at the time of this Hadith with the Messenger of Allah.' And he did not deny anything of the Hadith."

Sunan Ibn Majah Book 2, Hadith 32 Next Hadith → The Messeenger of Allah said: "Whoever catches one Rak'ah of the Subh before the sun rises, then he has caught it, and whoever catches one Rak'ah of the 'Asr before the sun sets, then he has caught it." (Sahih)Another chain with similar wording.

Sunan Ibn Majah Book 2, Hadith 34