4. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Muhammad ibn ‘Isma‘il from Hammad ibn ‘Isa from Abu ‘Abdillah who said, “One who is in the state of Ihram must not answer anyone who calls him with the word ‘Labbayka’ until his Ihram is complete.“ I then asked, “How must he say it?“ He (the Imam) said, “He can say, ‘O Sa‘d.”