Undisputedly, in the suit for recovery filed by the decreeholder-respondent, the petitioner did not raise the question with regard to the applicability of the provisions of Haryana Act nor any such issue was claimed by him. It is well settled that the Executing Court cannot go behind the decree and has to execute the decree as it is. It is not the case of the petitioner that the decree is a nullity. Moreover, the question raised by the petitioner could only be proved or disproved. The judgment relied upon by the learned counsel for the petitioner is distinguishable as in that case, a specific issue was raised by the judgment-debtor in the main suit in this respect. However, while deciding the aforesaid issue, the trial Court had specifically mentioned that since the suit was at the trial stage therefore, it was not open to the defendant to raise the question of the jurisdiction of the Civil Court as envisaged under Section 17 of the Haryana Act.