Shiva Purana
तत्तत्तत्त्वाधिपामेव मूर्तिं स्थूलां विचिंतयेत् ॥ सदाशिवांता ब्रह्माद्यभवाद्याश्चाष्टमूर्तयः ॥ ७४ ॥
One should meditate on the gross form of the Supreme Personality of Godhead, who is the master of all these elements. Sadaśiva, Brahmā, Bhava and others are eight forms of the Supreme Personality of Godhead.
english translation
tattattattvAdhipAmeva mUrtiM sthUlAM viciMtayet ॥ sadAzivAMtA brahmAdyabhavAdyAzcASTamUrtayaH ॥ 74 ॥
hk transliteration by Sanscript