Skandapurana 1.3.9.3

1.3.9.3

dhyānamādau prakartavyaṃ gaṇeśasya yathāvidhi..
āgamā bahavo jātā gaṇeśasya yathā mama.. 11.3 ..

First, the meditation on Gaṇeśa should be properly performed according to rule. / Many scriptures have arisen for Gaṇeśa, just as for me,