It was narrated from 'Uqbah bin 'Amir that the Messenger of Allah (ﷺ) said:
"There is no contractual obligation after four (days)." (RU)
English reference (RU): Vol. 3, Book 12, Hadith 2245 (RU)
Arabic reference (RU): Book 12, Hadith 2330 (RU)