Tobit 12:19
17 But he said to them, "Do not be afraid; peace be with you. Bless God forevermore. 18 As for me, when I was with you, I was not acting on my own will, but by the will of God. Bless him each and every day; sing his praises. 19 Although you were watching me, I really did not eat or drink anything—but what you saw was a vision. 20 So now get up from the ground, and acknowledge God. See, I am ascending to him who sent me. Write down all these things that have happened to you." And he ascended. 21 Then they stood up, and could see him no more.
Augustine City of God 13.22
On the City of God Against the PagansFor so also was it with the angels who presented themselves to the eye and touch of men, not because they could do no otherwise, but because they were able and desirous to suit themselves to men by a kind of manhood ministry. For neither are we to suppose, when men receive them as guests, that the angels eat only in appearance, though to any who did not know them to be angels they might seem to eat from the same necessity as ourselves. So these words spoken in the Book of Tobit, You saw me eat, but you saw it but in vision; that is, you thought I took food as you do for the sake of refreshing my body. But if in the case of the angels another opinion seems more capable of defense, certainly our faith leaves no room to doubt regarding our Lord Himself, that even after His resurrection, and when now in spiritual but yet real flesh, He ate and drank with His disciples; for not the power, but the need, of eating and drinking is taken from these bodies. And so they will be spiritual, not because they shall cease to be bodies, but because they shall subsist by the quickening spirit.
Notes and References
"... the West, further from the home of the Hebrew canon, and knowing the Old Testament chiefly through the Latin version of the LXX, did not scruple to mingle non-canonical books with the canonical. Hilary and Ruffinus were doubtless checked, the one by the influence of Eastern theologians, the other by the scholarship of Jerome; but Hilary mentions that there were those who wished to raise the number of the canonical books to twenty-four by including Tobit and Judith in the canon. From the end of the fourth century the inclusion of the non-canonical books in Western lists is a matter of course. Even Augustine has no scruples on the subject; he makes the books of the Old Testament forty-four (de doctr. Chr. ii. 13 "his xliv libris Testamenti Veteris terminatur auctoritas"), and among them Tobit, Judith, and two books of Maccabees take rank with the histories; and the two Wisdoms, although he confesses that they were not the work of Solomon, are classed with the Prophets. His judgement was that of his Church ("sunt canonicae scripturae Salomonis libri quinque ... Tobias, Judith ... Machabaeorum libri duo"). The African Church had probably never known any other canon, and its belief prevailed wherever the Latin Bible was read ..."
Swete, Henry Barclay An Introduction to the Old Testament in Greek: With an Appendix Containing the Letter of Aristeas Cambridge University Press, 1900