اللَّهُمَّ زِدْ هَٰذَا الْبَيْتَ تَشْرِيفًا وَتَعْظِيمًا وَتَكْرِيمًا وَمَهَابَةً، وَزِدْ مَنْ شَرَّفَهُ وَكَرَّمَهُ مِمَّنْ حَجَّهُ أَوِ اعْتَمَرَهُ تَشْرِيفًا وَتَكْرِيمًا وَتَعْظِيمًا وَبِرًّا
The Prophet (peace be upon him) was asked: 'What supplication is most heard (accepted)?' He said: 'In the last part of the night, and at the end of the obligatory prayers.' It is also narrated from the Salaf that dua upon first seeing the Kaaba is accepted.