<p style='text-align: justify;'>Treatise on the kindling of fire on Šabbat, as commentary on Exodus 35:1-3; probably an anti-Karaite polemic. Ginzberg (1929, 487–490) suggests it’s a Hebrew version of a treatise by Saʿadya Gaʾon (‘The book collecting the proofs for the lamps’ perhaps?)</p>