From Sahih Muslim (Hadith 1921):
Ibn 'Abbas reported:I heard it from so many Companions of the Messenger of Allah (ﷺ) and one among them is 'Umar b. Khattab, and he is most dear to me among them that the Messenger of Allah (ﷺ) prohibited observing of prayer after the dawn prayer till the sun rose and after the 'Asr till the sun set
Reference: Muslim 1921