Sayyidina Anas (RA) narrated that the Prophet (SAW) saw a man drive his camel. He said to him, “Ride it.” The man said, “0 Messenger of Allah! It is a sacrificial camel.” So, he said three or four times, “Ride it!” and “wayhaka”, or “waylaka.” (meaning, ‘Alas for you’ or ‘shame on you’ both words have same meaning).
[Ahmed13414, Bukhari 1690, Ibn e Majah 3104]