Is it permissible for a friend to use favoritism (wāsiṭa) in a restaurant to take someone else's turn among the customers, relying on the principle "necessities permit the forbidden" under the pretext of fatigue, and on the ḥadīth of Jābir regarding the story of the man who died after performing ghusl, even though the questioner believes there is no necessity and no similarity between the two cases?

The principle is that whoever precedes another to a right is more entitled to it, like those waiting in line. The one who came first has priority, and it is not permissible for someone who came after him to overtake him. As for violating this on the pretext of necessity, it is not acceptable unless a legitimate necessity is truly present. This is a state of danger or severe hardship from which harm to life, limb, honor, or property is feared. Mere fatigue or exhaustion is not a necessity. Jabir's hadith (definition) is about utilizing legitimate concessions in their proper place and has no relation to the aforementioned issue.