Ok i accept the challenge on behalf of sir @ashoswai, and here are the proofs
Rigveda (10/85/13) declares, “On the occasion of a girl’s marriage oxen and cows are slaughtered.” 
Rigveda (6/17/1) states that “Indra used to eat the meat of cow, calf, horse and buffalo.” https://twitter.com/Aabhas24/status/1259748122999181312

Vashistha Dharmasutra (11/34) writes, “If a Brahmin refuses to eat the meat offered to him on the occasion of ‘Shraddha’ or worship, he goes to hell.”

Maharishi Yagyavalkya says in Shatpath Brahmin (3/1/2/21) that, “I eat beef because it is very soft & delicious.”
Apastamb Grihsutram (1/3/10) says,“The cow should be slaughtered on the arrival of a guest,on the occasion of ‘Shraddha’ of ancestors & on the occasion of a marriage"

Manusmriti (Chapter 5 / Verse 30) says, “It is not sinful to eat meat of eatable animals, for Brahma has created both the eaters and the eatables.”

Manusmriti (5 / 35) states:" When a man who is properly engaged in a ritual does not eat meat, after his death he will become a sacrificial animal during twenty-one rebirths"

Even Swami Vivekananda said
“You will be surprised to know that according to ancient Hindu rites and rituals, a man cannot be a good Hindu who does not eat beef”. (The Complete Works of Swami Vivekanand, vol.3, p. 536).