Depending on reputation level when you visit a Temple and Donate 7 times you will receive the following gift.Respectable 201-400, Guardian Angel; 7 hours
Honorable 401-600, Wizard Eye; 7 hours
Glorious 601-800, Day of the Gods; +38, 28 hours
Angelic 801-1000, Hour of Power; +12, 8 hours 4’, Haste 2 hours 28’
Saintly 1001+, Day of Protection; +28, 11 hours
If you run Grayface's patch right clicking on reputation will show reputation number.
Just donating @ Temples to get to Respectable will only bring you up to 200, 7 additional donations, no gift.