וְעָנִ֨יתָ וְאָמַרְתָּ֜ לִפְנֵ֣י ׀ יְהוָ֣ה אֱלֹהֶ֗יךָ אֲרַמִּי֙ אֹבֵ֣ד אָבִ֔י וַיֵּ֣רֶד מִצְרַ֔יְמָה וַיָּ֥גָר שָׁ֖ם בִּמְתֵ֣י מְעָ֑ט וַֽיְהִי־שָׁ֕ם לְג֥וֹי גָּד֖וֹל עָצ֥וּם וָרָֽב׃
Tosefta Bikkurim
We do not bring Bikkurim (first fruits) before Shavuot, and if they are [nonetheless] brought, we must wait until Shavuot arrives and [only then] recite the declaration [beginning with "My father was a wandering Aramean..." (Deut. 26:5-10)].