Making parents weep is a major sin

Ibn 'Umar said, "Making parents weep is part of disobedience and one of the major wrong actions."  

أَنَّهُ سَمِعَ ابْنَ عُمَرَ يَقُولُ بُكَاءُ الْوَالِدَيْنِ مِنَ الْعُقُوقِ وَالْكَبَائِرِ