Bhagavatapurana 8.23.14

8.23.14

brahman santanu śiṣyasya karmacchidraṃ vitanvataḥ /
yat tat karmasu vaiṣamyaṃ brahmadṛṣṭaṃ samaṃ bhavet //

14. The Lord said:— O Brahmin, make up the interruption in the sacrifice that was being performed by thy disciple; for any defect in a sacrifice, or religious rite will be removed even if Brahmins look at it (and it will be complete if actully carried out by them).