Matsya Purana 232.15

232.15

śivamabhyarcayeddevaṃ paśuñcāsmai nivedayet.
rudrebhya iti vṛkṣeṣu hutvā rudraṃ japettataḥ .. 232.14 ..

Where the fruits and flowers of trees undergo change the sovereign is sure to die. Such ill forebodings should be averted. The tree in which the above signs appear should be covered with clothe and adored with sandal, incense and then an umbrella should be stretched over it. Then Lord Śiva should be worshipped and an animal should be sacrificed near the tree.—12-14

Then the mantra “Rudrabhyah, etc” should be uttered and oblations offered unto Fire and the Rudra Mantra is to be muttered Afterwards Brâhmaṇas should be worshipped and fed with clarified butter, rice cooked in milk and sugar, sugar, etc., and then give them presents of land. Then rejoicings should be held in the house and Lord Śiva should be worshipped with music and dancing.—15