If someone intends Hajj and then adds Umrah to it

Hazrat Ibn Umar (may Allah be pleased with both of them) put on the Ihram for Umrah, then walked a little and said: Hajj and Umrah are equal; you people bear witness that I have made Hajj obligatory along with Umrah.

A man asked Hazrat Jabir whether, having entered into the state of Ihram for Hajj, he could combine Umrah with it. He replied, "Yes, and sacrifice a goat."

Ibrahim says that Hajj will be converted to Umrah, but Umrah will not be converted to Hajj.

Hazrat Mujahid, Hazrat Tawus, and Hazrat Ata say that if a person puts on the Ihram for Hajj, if he wishes, he may combine Umrah with it and become a Qarin, and send a Hadi (sacrificial animal) as well.

15662 - From Ata and Tawus, or one of them, regarding a man who enters into ihram for Hajj: they said, if he wishes, he may combine it with Umrah and thus be a Qarin, and he should offer a sacrificial animal.