Musannaf Ibn Abi Shaybah

Hazrat Qatadah says regarding the person who puts on the Ihram for Umrah and then has intercourse with his wife before performing the Tawaf of the Ka'bah, that he should return to the place from where he put on the Ihram, put on the Ihram again at that very place (and perform Umrah again), and offer a sacrifice.