Ian Wilkinson, 70, gave his first sermon since his recovery from the meal to a congregation at Korumburra Baptist Church, in Victoria's South Gippsland region, on February 11.
An emotional Mr Wilkinson described the preceding week as being "pretty big" citing six months since the deaths of his wife and friends, his own 70th birthday and what would have been his 45th wedding anniversary.
"The ways are sometimes hard, but God is good. He's with us," Mr Wilkinson told his congregation in footage published by the Herald Sun.
"He promised to never leave ... and I can say, that is true."
Mr Wilkinson spent almost two months in hospital critically ill from alleged poisoning following the lunch at Erin Patterson's Leongatha home on July 29 last year.
He was one of four people who fell ill after the meal.
His wife Heather Wilkinson, 66, her sister Gail Patterson and brother-in-law Don Patterson, both 70, all died after the meal.
Erin Patterson, 49, was charged with three counts of murder in November.
She is also accused of attempting to murder Mr Wilkinson.
Police will allege she attempted to murder her ex-husband Simon Patterson four times between November 2021 and July 2022.
Erin Patterson has denied any wrongdoing and is remanded in custody to appear in court on May 3.
