Respect for mothers occupies a very high status in Islaam, and is very heavy in its scales.

It is reported in the ‘Saheeh Muslim’ that a man came to the Rasoolul Laah (صلى الله عليه و سلم)  and said: “O Prophet of Allaah [Almighty], who is most deserving of my kind treatment?”
He replied: “Your mother.”
The man asked: “Then who?”
He replied: “Your mother.”
The man asked again: “Then who?”
He replied: “Your mother.”
The man asked again: “Then who?”
He replied: “Your father.”