BT BB 7b(18) :איבעי ליה לאפוקה בחיי אבוהון, ומדלא אפקה בחיי אבוהון שמע מינה ציורי צירוה‏ : he needed to have produced it in their father's lifetime, but since he did not, deduce from it that they actually forged it
See the entire entry for ṣwr vb. to depict

BT BB 7b(18) :איבעי ליה לאפוקה בחיי אבוהון, ומדלא אפקה בחיי אבוהון שמע מינה ציורי צירוה‏ : he needed to have produced it in their father's lifetime, but since he did not, deduce from it that they actually forged it
See the entire entry for šmˁ vb. to hear