93. No mortgagee paying off a prior mortgage, whether with or without notice of an intermediate mortgage, shall thereby acquire any priority in respect of his original security; and, except in the case provided for by section 79, no mortgagee making a subsequent advance to the mortgagor, whether with or without notice of an intermediate mortgage, shall thereby acquire any priority in respect of his security for such subsequent advance.
Transfer of Property Act, 1882
Section 93: Prohibition of tacking
Chapter IV — Of Mortgages of Immoveable Property and Charges
Source: official text of the Transfer of Property Act, 1882.