From Sahih Bukhari (Hadith 930):
Narrated Jabir bin `Abdullah:A person entered the mosque while the Prophet (ﷺ) was delivering the Khutba on a Friday. The Prophet (ﷺ) said to him, "Have you prayed?" The man replied in the negative. The Prophet (ﷺ) said, "Get up and pray two rak`at
Reference: Bukhari 930