It was narrated that Ibn ‘Abbas (رضي الله عنه) said:

We came with the Messenger of Allah (ﷺ) as pilgrims, and he told them to make it [Hajj] 'Umrah, then he said: "If l had known before what I know now, I would have done what you have done. But now 'Umrah has been incorporated into Hajj until the Day of Resurrection.” Then he interlaced his fingers. And the people exited ihram, except those who had the hady with them. ‘Ali came from Yemen and the Messenger of Allah (ﷺ) said to him: “For what have you entered ihram?” He said: "I have entered ihram for what you entered ihram for." He said: “Do you have a hady with you?" He said: No. He said: "Then carry on as you are, and you can have one-third of my hady." And the Messenger of Allah (ﷺ) had one hundred camels with him.