At the scene of the collision,Mr Abdallah spoke glowingly of his family as dozens of community members came to the destroyed fence on Bettington Road to lay flowers and hang crucifixes. Many were distraught and in tears.
"My name is Daniel Abdallah. I have a wife,Leila,and six beautiful children I've been blessed with. Yesterday,I lost three of my children,"he said through tears.
"I'm numb. All I just want to say is please,drivers,be careful. These kids were just walking innocently,enjoying each others'company and this morning I woke up,I've lost three kids."
Supported by friends,Mr Abdallah told reporters about his three children who died.
"Antony is 13,very handsome boy. He loved basketball. He woke up that morning and said,'We're going to play this game for Kobe[Bryant].'
"Angelina,she was my MLH,my little helper. Anything I needed,she had my back.
"Sienna,she was my little diva,my little actress.
"They've gone to a better place."
"We're all related. They were all coming over to get babysat. I told them to go for a little walk,to stay together,you guys should be OK. Give them a little bit of independence. This is one in a million. They were just walking on the footpath,"he said.
Later in the morning,the children's mother arrived at the scene of the crash,leaning on supporters to stand up and walk.
The childrens'cousin Veronique Sakr,aged 11,was also killed when the ute mounted the path.
"We are devastated by the tragic and senseless loss of our beautiful girl,Veronique,"her family said in a statement released on Sunday afternoon."Words cannot describe the pain we feel for all the families impacted by this tragedy.
"Veronique was a vibrant 11 year old girl,full of life,love and had a maturity well beyond her young years. Veronique brought us all such joy and will be forever remembered. Veronique will remain in our hearts always,"the statement said.
"We would like to thank the emergency services,first responders and all who attended the tragic scene. God bless you,Veronique."
Police said the children were on the footpath when a Mitsubishi Triton utility allegedly mounted the kerb and struck them.
"The driver of the four-wheel-drive was subjected to a roadside breath test and returned a positive result. He was arrested and taken to Castle Hill police station for a breath analysis,"police said in a statement.
He was also taken to hospital to undergo mandatory testing,police said.
Officers from The Hills Police Area Command established a crime scene,which will be examined by specialist police from the Metropolitan Crash Investigation Unit.
Councillor for the Epping Ward of the City of Parramatta,Donna Davis,expressed her shock on Facebook,describing it as"horrific"and"senseless".
"My heart goes out to those involved,their loved ones,friends and first responders,"she said.
NSW Ambulance acting Superintendent Andrew McAlpine said paramedics had arrived to a horrific scene.
"When the first crews arrived on scene they were met with carnage,a very,very difficult scene with a lot of chaos,"he said.
With Nick O'Malley