your heads until the sacrificial animal reaches its place of sacrifice. But whoever among you is ill or has an ailment of the scalp must offer compensation by fasting, charity, or sacrifice. When you are secure, whoever performs ‘umrah followed by Hajj must offer whatever sacrificial animal he can afford.”
Surah al-Baqarah, 196

Then He said:

“And do not shave your heads until the sacrificial animal reaches its place of sacrifice. But whoever among you is ill…”
To the end of the verse. Surah al-Baqarah, 196

Concerning prayer in circumstances of fear, He said:

“When you are among them and lead them in prayer, let a group of them stand with you, taking their weapons. When they have prostrated, let them take their positions behind you, and let another group come forward…”
To the end of the verse. Surah al-Nisā’, 102

Concerning the prohibition of uttering words of disbelief, He said:

“Those who disbelieve in Allah after having believed—not those who are compelled while their hearts remain firm in faith, but those who willingly embrace disbelief—will incur Allah’s wrath and suffer a tremendous punishment.”
Surah al-Nahl, 156

He also said:

“Let not the believers take the disbelievers as allies instead of the believers. Whoever does so has no bond with Allah, unless you do so as a precaution to protect yourselves from them.”
Surah Āl ‘Imrān, 28

Concerning prohibited acts, He said:

“Do not compel your slave girls into prostitution, if they wish to remain chaste, seeking the fleeting gains of worldly life. If anyone compels them, then after their compulsion Allah is All-Forgiving, Most Merciful.”
Surah al-Nūr, 33

Thus He, glorified be He, permitted a person under compulsion to utter words of disbelief with his tongue, provided that