וּבַיּ֣וֹם הַשְּׁמִינִ֗י יִֽקַּֽח־לוֹ֙ שְׁתֵּ֣י תֹרִ֔ים א֥וֹ שְׁנֵ֖י בְּנֵ֣י יוֹנָ֑ה וּבָ֣א ׀ לִפְנֵ֣י יְהוָ֗ה אֶל־פֶּ֙תַח֙ אֹ֣הֶל מוֹעֵ֔ד וּנְתָנָ֖ם אֶל־הַכֹּהֵֽן׃
제팔일에 산비둘기 둘이나 집비둘기 새끼 둘을 자기를 위하여 취하고 회막문 여호와 앞으로 가서 제사장에게 줄 것이요
Mishneh Torah, Positive Mitzvot
That a man having an issue shall bring a sacrifice, after he is cleansed of his issue, as it is said, “And when he that hath an issue is cleansed of his issue….” (Lev. 15:13-15).
Sefer HaChinukh
The commandment of the sacrifice of the zav when he is healed from his discharge: That the zav offer his sacrifice after he is healed from his discharge, as it is stated (Leviticus 16:13-14), “When the zav is purified from his discharge, etc. And on the eighth day, he shall take two doves, etc.” And this sacrifice is two doves or two young pigeons — one for a sin-offering and one for a burnt-offering. And he is called, “lacking atonement,” until he offers it.
Sefer HaChinukh
That which I have written above (Sefer HaChinukh 95), that the matter of the sacrifice is to hint to the lowering of the impulse of the desiring body and raise up the intellectual soul, is from the roots of the commandment. And hence when the zav is healed, it is fitting for him to recognize the evil of his desire and to straighten out his body with all of his strength. And with the matter of the sacrifice, he will begin to take instruction.