Does one who did not spend the night at Muzdalifah repeat Hajj?

The questioner : ... regarding the issue of Muzdalifah, one of our brothers in Sahab. They performed Hajj in previous years and did not spend the night at Muzdalifah; they passed through Mina. Now he is asking whether he should perform the Hajj of Islam, because his previous Hajj was not accepted, or whether he should perform Hajj on behalf of his father ... ?

The Shaykh : He should not perform Hajj on his own behalf, because as long as he did not go to Muzdalifah, it means he did not pray Fajr there. And as long as he did not pray Fajr there, his Hajj is not complete. And as long as his Hajj is not complete, he must repeat it. Yes.