4 is connected to Thanksgiving; Yehudah was 4th tribe, in conjunction with whose birth Le’oh says:- “haPa’am Odeh Es haShem”
Orlah after 3 years, in 4th year is called “Kodesh Hilullim” an expression of praising [Same verb as Hallel which we recite today for Yom ha’Atzma’ut] when we take the fruit to Yerusholayim, and consume the fruit in Yerusholayim [Just 23n days left until Yom Yerusholayim].
Talking about 4, Thanksgiving is on 4th Thursday in November.
Now you Hashemisreading have a Devar Toroh on Kedoshim, whose # of Pesukim is “4 cubed”