"I express regret if the words used by me hurt anybody or caused mental agony," he said in a Facebook posting.
Balaram, MLA from Thrithala in Palakkad district, said he also wanted to put an end to the controversy over the remark.
In his Facebook postings yesterday, he had made critical comments against Idukki Bishop Mathew Anikkuzhikattil, who had come down heavily on a section of the Congress leadership recently.
Senior Congress leaders, including Chief Minister Oommen Chandy and KPCC President V M Sudheeran had taken exception to Balaram's remark.
The issue started when Congress candidate for Idukki Dean Kuriakose called on the Bishop yesterday seeking his blessings blessings. During the meeting, the Bishop said political leaders visit him when elections are round the corner but forget about their commitments when in power.