"O you who have believed, do not approach prayer while you are intoxicated." Its interpretation has already passed in Surat al-Baqarah in the interpretation of: "They ask you about wine and gambling."

His saying: "And not in a state of janaba (major ritual impurity), except as those passing through, until you have performed ghusl (full washing)." Ibn Abbas's interpretation: He is the traveler; if he does not find water, he performs tayammum (dry ablution) and prays. "And if you are ill or on a journey or one of you comes from the ghait (place of relieving oneself)." Muhammad [Ibn Abi Zamanin] said: The ghait is the hadath (impurity/defecation). The origin of the word ghait is the low-lying place in the land; for when they wanted to relieve themselves, they would go to a depression in the land and do so there, so it became a metonym for the hadath.

His saying: "And if you are ill" contains an implicit meaning: unable [to approach] water due to the ailment; this was mentioned by Ismail ibn Ishaq.