וְיָתֵ֛ד תִּהְיֶ֥ה לְךָ֖ עַל־אֲזֵנֶ֑ךָ וְהָיָה֙ בְּשִׁבְתְּךָ֣ ח֔וּץ וְחָפַרְתָּ֣ה בָ֔הּ וְשַׁבְתָּ֖ וְכִסִּ֥יתָ אֶת־צֵאָתֶֽךָ׃
Harus ada padamu sebuah sekop kecil di antara perlengkapan senjatamu; apabila engkau berjongkok di luar, engkau harus menggali lubang dengan sekop itu, lalu berbalik dan menutupi kotoranmu.
Rashi
על אזנך [AND THOU SHALT HAVE A PIN] על אזנך — i.e. besides (על, “in addition to”, not “upon”) your other implements.
Chizkuni
ויתד תהיה לך על אזנך, “you shall have a paddle amongst your weapons;” seeing that only men were going out to fight a war, and seeing that they had the Holy Ark with them when they went to war but were not able to build separating walls, which would have insulated the Ark from exposure to the ritually impure, the people who had nocturnal seminal emissions were required to leave the camp. But when the Israelites wandered for forty years in the desert, there were men, women and children in the camp. Therefore, separating walls were built to separate the Ark and the Tent of meeting from the camp. In the desert those who were ritually impure did not have to leave the camp of the Israelites (but only the camp of the Levites) because of the ever-present danger. In the army everyone had to dig his own hole outside the camp to bury his excrement and cover it, but during the forty years in the desert, everyone dug his own hole in his backyard within the camp of the Israelites.
Ibn Ezra
The ’alef in the word your weapons (from “and they washed their weapons” [I Kings 22: 38]) is extraneous.