Mayor Bill de Blasio donor Jona Rechnitz took the witness stand Tuesday to testify for the second time in 10 months to bribing his way through City Hall and the NYPD.

Rechnitz, 35, called the NYPD’s ex-chief of department Philip Banks one of the “two or three substantial ones” when asked about police brass he showered with gifts in exchange for favors.

The other two were former NYPD Deputy Michael Harrington, who has pleaded guilty, and James Grant, who is awaiting trial.

Banks has not been charged with any wrongdoing.

Rechnitz, a real-estate developer, also claimed he had been “bribing my way through City Hall,” but the jury was sent home before he could provide specifics. He continues on the stand Wednesday.

Rechnitz is testifying at the corruption retrial of ex-city jails union chief Norman Seabrook, who is accused of steering $20 million in union money to a troubled hedge fund in exchange for $60,000 in bribes. Seabrook’s 2017 trial ended in a hung jury.