From the Nabataean Aramaic letter 𐢑 (l, “lamadh”), derived from the Phoenician letter 𐤋 (l, “lāmed”), from the Egyptian hieroglyph 𓌅. See also Classical Syriac ܠ (l, “lāmadh”), Hebrew ל (l, “lamed”), Ancient Greek Λ (L), Latin L.
Practice speaking and memorizing "ل" and many other words and sentences in Arabic.