Garudapurana 1.117.6

1.117.6

pūjā damanakaḥ śambhorveśākhe 'śokrapuṣpakaiḥ /
mahārūpāya naivedyaṃ guḍabhaktaṃ puṭṭabaram //

In Vaiśākha, the worship of Śambhu is with marjoram and aśoka flowers; / for the Great-Formed One, the food-offering is molasses-rice and fine cloth;