‏النكاح : Hadeeth No:3348 Abu Haraira (Allaah be pleased with him) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: If any one of you is invited, he should accept (the invitation). In case he is fasting, he should pray (in order to bless the inmates of the house), and if he is not fasting he should eat....

‏الصلاة : Hadeeth No:1167 This hadith has been narrated by Zaid b. Aslam with the same chain of transmitters and he said: He should perform two prostrations before the salutation, as it was mentioned by Sulaiman b. Bilal....