(hanya allah yang tahu hukum terbaik)
ENGLISH
In the case of Mount Arjuna (Lengekahan Valley), with a water source 2.6 km away, it is better to choose tayamum. This distance is considered "very far" (if walking on the trail) and it would be burdensome to perform wudhu repeatedly (as water is also needed for eating and drinking). Based on Islamic law, which provides concessions in difficult situations, tayamum becomes a valid and more practical choice. Therefore, in my opinion, tayamum is the lawful and more convenient option in this case
(Only Allah knows the best hukum)