Sneezing vs. Yawning

Abu Hurairah (RadiAllaahu anhu) reported: The Prophet (Salallahu alaihe wa sallam) said, "Allaah likes sneezing and dislikes yawning. When any one of you sneezes and says 'Al-hamdu lillaah (praise be to Allaah)', it becomes obligatory upon every Muslim who hears him to respond with 'Yarhamuk-Allaah (may Allaah have mercy on you)'. Yawning is from the shaitan (devil). When one of you feels like yawning, he should restrain it as much as possible, for the devil laughs when one of you yawns." [Al-Bukhari]