Ruling on combining the two-thirds bequeathed by the testators

Is the amount the deceased bequeathed from the one-third to be paid out at once in channels of good? And if there is a one-third bequest for my father and another for my mother, should I combine them?
There is nothing wrong with a person combining his father’s one-third and his mother’s one-third, and all of it is according to what was bequeathed. Allah grants His favor to whom He wills. As for whether it should be paid out at once or increased, he must consider the public benefit. Is it better to pay it out at once for the construction of a mosque in which he participates, or something similar, or is it better to increase it and give its increase as charity? He should look at what is in the public benefit.