There is a passage in DN 16 when the Buddha was about to pass away, the twin sala trees shower their blossom flowers to honor the Buddha, but it isn’t the highest veneration and worship, the highest worship for the Buddha is practicing according to Dhamma:
Now at that time the Twin Sal Trees were full of flowering blossoms, outside of flowering time, and they were sprinkling down on the Realised One’s body, showering down, pouring down on the Realised One in worship. Also the Divine Coral Tree flowers were falling from the sky, and they were sprinkling down on the Realised One’s body, showering down, pouring down on the Realised One in worship. Also Divine sandalwood powder was falling from the sky, and was sprinkling down on the Realised One’s body, showering down, pouring down on the Realised One in worship. Also Divine music played in the sky in worship of the Realised One. Also Divine songs played in the sky in worship of the Realised One.
Then the Gracious One said this to venerable Ānanda: “The Twin Sal Trees are full of flowering blossoms, outside of flowering time, and they are sprinkling down on the Realised One’s body, showering down, pouring down on the Realised One in worship. Also the Divine Coral Tree flowers are falling from the sky, and they are sprinkling down on the Realised One’s body, showering down, pouring down on the Realised One in worship. Also Divine sandalwood powder is falling from the sky, and is sprinkling down on the Realised One’s body, showering down, pouring down on the Realised One in worship. Also Divine music plays in the sky in worship of the Realised One. Also Divine songs play in the sky in worship of the Realised One.
But it is not in this way, Ānanda, that the Realised One is honoured, respected, revered, worshipped, or esteemed. But that monk, nun, layman, or laywoman, Ānanda, who lives practising the Teaching in accordance with the Teaching, correct in their practice, living in conformity with the Teaching, he honours, respects, reveres, worships, and esteems the Realised One with the highest worship. Therefore, Ānanda, thinking: ‘Let us live practising the Teaching in accordance with the Teaching, correct in our practice, living in conformity with the Teaching,’ this is how you are to train, Ānanda.”