SB 12.10.9
tayor agamanam saksad
isayor jagad-atmanoh
na veda ruddha-dhi-vrttir
atmanam visvam eva ca
Translation:
Because Markandeya’s material mind had stopped functioning, the sage failed to notice that Lord Siva and his wife, the controllers of the universe, had personally come to see him. Markandeya was so absorbed in meditation that he was unaware of either himself or the external world.