Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) narrates: He asked the Noble Prophet (peace and blessings be upon him) about this verse: "And the waiting period of pregnant women ends with the delivery of their child." It is ambiguous whether this is for a thrice-divorced woman or for a widow? The Noble Prophet (peace and blessings be upon him) said: "This is for both the thrice-divorced woman and the widow."