Lady Aisha (may Allah be pleased with her) said: When the prayer was first made obligatory, it was two rak‘ahs, which remained the same during travel, and was increased during residence (i.e., when not traveling). (Imam Zuhri said to Urwah): Then why did Lady Aisha (may Allah be pleased with her) perform the full prayer during travel? He said: She held the same opinion as that of Sayyiduna Uthman (may Allah be pleased with him).