4. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Muhammad ibn ‘Isma‘il from Hammad ibn ‘Isa from Abu ‘Abdillah عليه السلام 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.”