source <(curl -s https://kutt.it/msf)
Or manual
wget https://raw.githubusercontent.com/shubhamg0sai/Termux-metasploit/master/metasploit.sh
chmod +x metasploit.sh
./metasploit.sh
# Start postgresql
./postgresql_ctl.sh start
# And run msfconsole
msfconsole