What is the ruling on saying takbir when pleased with the realization of a matter?

Question:
What is the ruling on collective or individual takbir when pleased with a matter, or when a matter is realized?

Answer:
As for individual takbir: for one to say takbir by himself, this is prescribed. The Prophet (peace and blessings be upon him) used to say takbir when he saw something that pleased him, and he would say takbir when the prohibitions of Allah were violated, (peace and blessings be upon him). He would say: , and he would say: . When some of the Companions said to him: "Make for us a tree of Anawat, just as they have their tree of Anawat," he said: . When some people said to him: "We seek intercession with Allah against you, and with you against Allah," he said: . And when he said to the Companions (may Allah be pleased with them) : , "Say takbir," then he said: , "Say takbir," then he said: , "Say takbir." This is the Sunnah.
As for doing it collectively with one voice, raising it all together and stopping it all together; we know of no basis for this. Rather, as far as we know, it is among the religious innovations, for them to raise it with one voice and end it with one voice, all of them together; this has no basis.
As for one person saying takbir and another saying takbir, so that the voices meet in the mosques or in the streets, each saying takbir in his own way, without regard for a single tone, a single style, or a single ending, there is no harm in that.