Keluaran 29:1

לקח This is the same as קח (the imperative, “Take thou” and must not be regarded as the infinitive). There are two forms of the root: one is קח and the other לקח, both having the same meaning. פר אחד ONE BULLOCK — to atone for the incident of worshipping the golden calf which is of the bullock species (cf. Sifra on Leviticus 9:2).

וְזֶ֨ה הַדָּבָ֜ר אֲשֶֽׁר־תַּעֲשֶׂ֥ה לָהֶ֛ם לְקַדֵּ֥שׁ אֹתָ֖ם לְכַהֵ֣ן לִ֑י לְ֠קַ֠ח פַּ֣ר אֶחָ֧ד בֶּן־בָּקָ֛ר וְאֵילִ֥ם שְׁנַ֖יִם תְּמִימִֽם׃

And this is the thing that thou shalt do to them to hallow them, to minister to me in the priest’s office: Take one young bullock, and two rams without blemish,