What if Bismillah was not said when slaughtering?

“In principle, the Tasmiyah remains valid for a slaughter within that Majlis (sitting). Accordingly, provided you did not become occupied for a prolonged period with conversation regarding some other matter to the extent that an onlooker would consider you to be occupied in something besides the slaughter, the Qurbani slaughter …”

“If a person forgot or unintentionally did not say Bismillah before slaughtering the chicken, the chicken will be Halaal. If he slaughtered the chicken intentionally discarding Bismillah, the chicken will be regarded as carrion and Haraam to consume.”

“If bismillah is left out unintentionally, then the animal is halaal and permissible. However, if it is left out intentionally, then the animal will not be halaal.”

“It is necessary to verbally utter the Tasmiyah. If one left out the Tasmiyah intentionally, then the animal will not be Halaal to consume. However, if one forgot to recite the Tasmiyah, then the animal will be Halaal to consume.”