What more is needed to establish inclusion of elbows in wuḍūʾ?

Bayān al-Ibdāl: Verbs, Nouns, Particles and Sentence-Level Meaning

• Similarity to a foreign-language preposition alone
• A translation of an unrelated verse
• Hadith, Prophetic practice and juristic evidence
• Deleting ilā from the Qur’an